The dimensions of {TAIL ~ 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 a disk drive having a particular form factor 
The dimensions of { TAIL ~ 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 a disk drive having a particular form factor
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH