a first connector part mounted to said first body and having therein {HEAD ~ first and second contact pins} which serve as said {TAIL ~ first and second output parts} 
a first connector part mounted to said first body and having therein { HEAD ~ first and second contact pins } which serve as said { TAIL ~ first and second output parts }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL