Turning a knob on the outside of {TAIL ~ the cartridge} moves all of the female portions of {HEAD ~ the zero insertion force connector} so that they clamp the male portions 
Turning a knob on the outside of { TAIL ~ the cartridge } moves all of the female portions of { HEAD ~ the zero insertion force connector } so that they clamp the male portions
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH