The frame has at least one mounting point at {HEAD ~ one end} of {TAIL ~ the upper surface} 
of
The frame has at least one mounting point at { HEAD ~ one end } of { TAIL ~ the upper surface }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL