a cover trim member for engagement with the housing for enclosing the cavity when the cover trim member is engaged with the perimeter of {HEAD ~ the concave surface} to {TAIL ~ the housing}, 
to
a cover trim member for engagement with the housing for enclosing the cavity when the cover trim member is engaged with the perimeter of { HEAD ~ the concave surface } to { TAIL ~ the housing } ,
OTH OTH OTH OTH OTH 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 HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH