Such a mounting surface 101 is usually vertically positioned in {TAIL ~ the vicinity} of a window or {HEAD ~ other architectural opening} 
Such a mounting surface 101 is usually vertically positioned in { TAIL ~ the vicinity } of a window or { HEAD ~ other architectural opening }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD