fig1 shows a sacrificial connector 10 in relation to a first complementary connector 20 that is intended to be coupled to a backplane printed circuit board ( pcb ) 40 of a hard disk drive ( hdd ) production test equipment ( not shown ) and to a second complementary connector 30 that is intended to be coupled to a pcb 45 which is further coupled to a hdd ( not shown ). this is disclosed in the singapore application serial no . 200701728 - 8 , ‘ connector apparatus ’. fig2 shows the sacrificial connector 10 in relation to the first complementary connector 20 . for illustration purposes , in both fig1 and 2 , the first complementary connector 20 is represented as a socket and the second complementary connector 30 is represented as a header . in absence of the sacrificial connector 10 , the second complementary connector 30 which is coupled to a hdd via the pcb 45 has to be plugged directly into the first complementary connector 20 which is coupled to the hdd production test equipment via the pcb 40 before any test sequences on the hdd production test equipment can be executed on the connected hdd . the second complementary connector 30 is then unplugged from the first complementary connector 20 when the test sequences are completed . each plugging and unplugging of the second complementary connector 30 to and from the first complementary connector 20 is known as a mating cycle . the performance of the first complementary connector 20 on the pcb 40 drops with increased mating cycles . the first complementary connector 20 on the pcb 40 is replaced as soon as the number of mating cycles reaches the number specified by the manufacturer of the first complementary connector 20 . to replace the first complementary connector 20 on the pcb 40 , one has to de - solder the first complementary connector 20 from the pcb 40 and then re - solder a new connector to the pcb 40 before a hdd can be coupled to the hdd production test equipment for testing . this is time consuming and repeated de - soldering and re - soldering of the first complementary connector 20 from and to the pcb 40 may damage the pcb 40 . the sacrificial connector 10 prolongs the useful life of the first complementary connector 20 by being the interface between the first complementary connector 20 and the second complementary connector 30 . since the mating and un - mating of the second complementary connector 30 is now with the sacrificial connector 10 , any wear and tear due to repeated mating and un - mating action will happen on the sacrificial connector instead of the first complementary connector 20 on the pcb 40 of the hdd production test equipment . along with this solution comes the need to secure the sacrificial connector 10 to the first complementary connector 20 on the pcb 40 of the hdd production test equipment so as to prevent any disengagement of the sacrificial connector 10 from the first complementary connector 20 during the mating and un - mating of the second complementary connector 30 with the sacrificial connector 10 . preferably , the sacrificial connector 10 can be secured to the first complementary connector 20 to the extent of withstanding a disengagement force of at least 4 newtons ( n ). here , the disengagement force refers to the force required to disengage the sacrificial connector 10 from the first complementary connector 20 . for illustration purposes , the sacrificial connector 10 as illustrated in fig2 comprises an elongated insulative housing 2 with a longitudinal base 4 and a plurality of contacts received in the housing 2 . the housing 2 forms a first mating surface 6 and a second mating surface 8 . since the first complementary connector 20 is a socket at its mating surface and the second complementary connector 30 is a header at its mating surfaces , the sacrificial connector 10 has a header at the first mating surface 6 and a socket at the second mating surface 8 . at each end of the sacrificial connector 10 is a bonding device 14 . the bonding device 14 may be any device that is able to temporarily hold the sacrificial connector 10 in place with respect to the first complementary connector 20 at the first mating surface 6 as the second complementary connector 30 is plugged and unplugged to and from the sacrificial connector 10 at the second mating surface 8 during each mating cycle . the bonding device 14 as illustrated in fig2 is a latching device with a latch release 12 , a latch member 16 extending in the direction of the first mating surface 6 and a hole 18 in the latch member 16 . as the sacrificial connector 10 engages with the first complementary connector 20 at the first mating surface 6 , a protrusion 22 coupled to an end wall on the first complementary connector 20 pushes the latch member 16 outwards away from the end wall of the first complementary connector 20 as the latch member 16 rides over the slope of protrusion 22 . as the latch member 16 passes the ridge of the protrusion 22 , the hole 18 in the latch member 16 engages with the protrusion 22 of the first complementary connector 20 causing the latch member 16 to fall back to its original horizontal position . this is the locked position of the latching device and the sacrificial connector 10 is engaged to the first complementary connector 20 . to disengage the sacrificial connector 10 from the first complementary connector 20 , the latch release 12 is depressed inwards towards the housing 2 of the sacrificial connector 10 . in doing so , the hole 18 in the latch member 16 disengages with the protrusion 22 on the first complementary connector 20 , and the two connectors 10 , 20 can be easily disengaged by pulling the sacrificial connector 10 in a direction away from the first complementary connector 20 . in cases where there is no bonding device 14 coupled to the sacrificial connector 10 and / or in cases where there is no corresponding device on the first complementary connector 20 to engage with the bonding device 14 on the sacrificial connector 10 such as to secure the sacrificial connector 10 to the first complementary connector 20 during the un - mating of the second complementary connector 30 from the sacrificial connector 10 , there is a need to have a separate engagement device to secure the sacrificial connector 10 to the first complementary connector 20 . fig3 shows another sacrificial connector 100 in relation to another first complementary connector 200 . the sacrificial connector 100 comprises an elongated insulative housing 110 with a longitudinal base 103 and a plurality of contacts received in the housing 110 . the housing 110 forms a first mating surface 106 and a second mating surface 108 . at one end of the housing 110 of the sacrificial connector 100 is a housing extension 120 which further comprises a hook 123 at one end of the housing extension 120 furthest from the second mating surface 108 . preferably , there is one housing extension 120 at each end of the housing 110 of the sacrificial connector 100 . the first complementary connector 200 comprises a housing 210 wherein at one end of the housing 210 is a housing protrusion 220 . preferably , there is one housing protrusion 220 at each end of the housing 210 of the first complementary connector 200 . the housing protrusion 220 further comprises a horizontal through - hole 240 which is in alignment with the housing extension 120 of the sacrificial connector 100 and a vertical tunnel 230 . it is preferred but not mandatory that the tunnel 230 be made perpendicular to the through - hole 240 . preferably the tunnel 230 extends from a first surface 231 of the housing protrusion 220 to a second surface 232 of the housing protrusion 220 . fig4 shows a close - up view of a vertical cross - section of the housing protrusion 220 with the sacrificial connector 100 and the first complementary connector 200 in an engaged position . while there is frictional resistance at the areas of contact between the housing extension 120 of the sacrificial connector 100 and the through - hole 240 of the housing protrusion 220 of the first complementary connector 200 , the frictional resistance may not be sufficient to prevent the disengagement of the sacrificial connector 100 from the first complementary connector 200 during the un - mating of the second complementary connector ( not shown ) from the sacrificial connector 100 , especially when the disengagement force is greater than 4 newtons ( n ). here , the disengagement force refers to the force required to disengage the sacrificial connector 100 from the first complementary connector 200 . fig5 is a perspective view of an exemplary engagement device 300 of the present invention in position before engagement with the first complementary connector 200 that is engaged with the sacrificial connector 100 . the engagement device 300 comprises a bracket body 310 which at least will partially envelop the sacrificial connector 100 once it is engaged and at least one engaging portion 320 extending from the bracket body 310 to the first complementary connector 200 and coupling to a portion of the first complementary connector 200 . fig6 a shows a close - up side view of a vertical cross - section of the housing protrusion 220 with the engagement device 300 , the sacrificial connector 100 and the first complementary connector 200 in an engaged position . fig6 b shows a close - up top view of a horizontal cross - section of the housing protrusion 220 with the engagement device 300 , the sacrificial connector 100 and the first complementary connector 200 in an engaged position . when in an engaged position , the engaging portion 320 of the engagement device 300 fits into the tunnel 230 of the housing protrusion 220 as illustrated by fig6 a . without the engagement device 300 , during the un - mating of the second complementary connector ( not shown ) from the sacrificial connector 100 , the disengagement force , typically greater than 4 newtons ( n ), may be exerted on the sacrificial connector 100 causing the sacrificial connector 100 to be disengaged from the first complementary connector 200 . however , when the engaging device 300 is engaged with the sacrificial connector 100 and the first complementary connector 200 , the engaging portion 320 of the engagement device 300 will obstruct the movement of the hook 123 thereby preventing the movement of the housing extension 120 of the sacrificial connector 100 and thus , preventing the sacrificial connector 100 from disengaging with the first complementary connector 200 . fig7 a is a perspective view of another exemplary engagement device 400 of the present invention in position before engagement with the sacrificial connector 10 which is engaged to another first complementary connector 250 that is coupled to the printed circuit board ( pcb ) 40 . as illustrated in fig7 a , the sacrificial connector 10 has a bonding device 14 coupled to each end of the sacrificial connector 10 . the first complementary connector 250 comprises a housing 255 , a housing protrusion 260 coupled to both ends of the housing 255 and at least one knob 270 extending from the housing 255 . as there is no corresponding device on the first complementary connector 250 to engage with the bonding device 14 on the sacrificial connector 10 , the sacrificial connector 10 may disengage from the first complementary connector 250 during the un - mating of the second complementary connector ( not shown ) from the sacrificial connector 10 . the engagement device 400 as shown in fig7 a comprises a bracket body 410 which at least will partially envelop the sacrificial connector 10 once it is engaged and at least one engaging portion 420 extending from the bracket body 410 to the first complementary connector 250 . the engagement device 400 further comprises at least one hole 425 on the engaging portion 420 which is positioned according to and will couple to at least one knob 270 on the housing 255 of the first complementary connector 250 when the engagement device 400 is engaged with the sacrificial connector 10 and the first complementary connector 250 . preferably , there is more than one knob 270 extending from the housing 255 and more than one hole 425 on the engaging portion 420 of the engagement device 400 . fig7 b shows the engagement device 400 engaged with the sacrificial connector 10 and the first complementary connector 250 . fig7 c shows the engagement device 400 further secured to the first complementary connector 250 by at least one securing device 275 such as but not limited to screws . while it is shown in fig7 a , 7 b and 7 c that there is a bonding device 14 coupled to the two ends of the sacrificial connector 10 , it is possible to do away with the bonding device 14 in this case since there is no corresponding device on the first complementary connector 250 to engage with the bonding device 14 . fig8 a is a perspective view of another exemplary engagement device 500 of the present invention in position before engagement with the sacrificial connector 10 engaged to another first complementary connector 280 coupled to the printed circuit board ( pcb ) 40 . the engagement device 500 comprises a bracket body 510 which at least will partially envelop the sacrificial connector 10 once it is engaged and at least one engaging portion 520 extending from the bracket body 510 to the first complementary connector 280 . the engagement device 500 further comprises at least one engagement lip 530 at the end of the engaging portion 520 which will hook over at least one portion on the first complementary connector 280 when the engagement device 500 is engaged with the sacrificial connector 10 and the first complementary connector 280 . fig8 b shows the engagement device 500 engaged with the sacrificial connector 10 and the first complementary connector 280 . while it is shown in fig8 a and 8b that there is a bonding device 14 coupled to the two ends of the sacrificial connector 10 , it is possible to do away with the bonding device 14 in this case since there is no corresponding device on the first complementary connector 280 to engage with the bonding device 14 . the foregoing description of the preferred embodiment of the invention has been presented for purposes of illustration and description . it is not intended to be exhaustive or to limit the invention to the precise forms disclosed , since many modifications or variations thereof are possible in light of the above teaching . all such modifications and variations are within the scope of the invention . the embodiments described herein were chosen and described in order best to explain the principles of the invention and its practical application , thereby to enable others skilled in the art to utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated thereof . it is intended that the scope of the invention be defined by the claims appended hereto , when interpreted in accordance with the full breadth to which they are legally and equitably suited .