The dimensions of the open end 48 are selected so that it fits within the opening in the front of {HEAD ~ the system unit} 12 which was for {TAIL ~ a disk drive} having a particular form factor 
for
The dimensions of the open end 48 are selected so that it fits within the opening in the front of { HEAD ~ the system unit } 12 which was for { TAIL ~ a disk drive } having a particular form factor
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 TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH