a mounting assembly for mounting said first rotatable means to {HEAD ~ a front wall} of {TAIL ~ said trailer body}, and 
of
a mounting assembly for mounting said first rotatable means to { HEAD ~ a front wall } of { TAIL ~ said trailer body } , and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH