{TAIL ~ The retainer} is inserted into {HEAD ~ the retainer insertion hole} and held in a temporarily secured position 
{ TAIL ~ The retainer } is inserted into { HEAD ~ the retainer insertion hole } and held in a temporarily secured position
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH