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