A prefabricated plug in assembly includes {HEAD ~ a front subframe} and {TAIL ~ a plug pin} arranged in it 
A prefabricated plug in assembly includes { HEAD ~ a front subframe } and { TAIL ~ a plug pin } arranged in it
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH