One end of the grid is connected to the first board and the other end of the grid is connected to the second board to move the boards relative to each other causing engagement between the contact elements and the pins of {HEAD ~ an array package} that may be inserted into {TAIL ~ the openings} 
inserted into
One end of the grid is connected to the first board and the other end of the grid is connected to the second board to move the boards relative to each other causing engagement between the contact elements and the pins of { HEAD ~ an array package } that may be inserted into { TAIL ~ the openings }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL