said holding unit comprises {HEAD ~ a groove} formed at {TAIL ~ an end portion} of said cover insulator and adapted to receive the end portion of said cable inserted therein 
formed at
said holding unit comprises { HEAD ~ a groove } formed at { TAIL ~ an end portion } of said cover insulator and adapted to receive the end portion of said cable inserted therein
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH