{TAIL ~ The holder} has a second engagement part for engagement of the first engagement part and {HEAD ~ the first mating part} 
{ TAIL ~ The holder } has a second engagement part for engagement of the first engagement part and { HEAD ~ the first mating part }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD