an inner side wall of said U shaped section provided with holes extending therethrough and positioned to correspond with {HEAD ~ the plurality} of {TAIL ~ mounting holes} in the unitary mounting wall to provide a clearance for the fasteners 
of
an inner side wall of said U shaped section provided with holes extending therethrough and positioned to correspond with { HEAD ~ the plurality } of { TAIL ~ mounting holes } in the unitary mounting wall to provide a clearance for the fasteners
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH