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