wherein said {HEAD ~ first and second connector parts} are engaged to establish {TAIL ~ electric connection} between the corresponding contact pins thereof only when said second body assumes a given position relative to said first body 
wherein said { HEAD ~ first and second connector parts } are engaged to establish { TAIL ~ electric connection } between the corresponding contact pins thereof only when said second body assumes a given position relative to said first body
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL 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