Lips 38 define an insertion opening 42 therebetween through which {HEAD ~ electrical receptacle} 16 may be inserted into {TAIL ~ C shaped channel} 18 
inserted into
Lips 38 define an insertion opening 42 therebetween through which { HEAD ~ electrical receptacle } 16 may be inserted into { TAIL ~ C shaped channel } 18
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH