a mating extension that extends from the cross member and through one of the plurality of {HEAD ~ openings} defined in {TAIL ~ the wall} of the housing, 
a mating extension that extends from the cross member and through one of the plurality of { HEAD ~ openings } defined in { TAIL ~ the wall } of the housing ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH