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