Holes in the body and {HEAD ~ button member} align when the button member is depressed relative to the body of {TAIL ~ insertion} of the cord, with the cord being locked in position relative to the device when the button member is released 
Holes in the body and { HEAD ~ button member } align when the button member is depressed relative to the body of { TAIL ~ insertion } of the cord , with the cord being locked in position relative to the device when the button member is released
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH