A method 1, wherein the retainer further comprises an extending operation projection, wherein {HEAD ~ the operation projection} extends out of {TAIL ~ the retainer insertion hole} for access to move the retainer to the fully inserted position 
extends out of
A method 1 , wherein the retainer further comprises an extending operation projection , wherein { HEAD ~ the operation projection } extends out of { TAIL ~ the retainer insertion hole } for access to move the retainer to the fully inserted position
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH