a receiver module housing, wherein {HEAD ~ the second end} of {TAIL ~ the tube} is mechanically coupled to an outer surface of the receiver module housing; and 
of
a receiver module housing , wherein { HEAD ~ the second end } of { TAIL ~ the tube } is mechanically coupled to an outer surface of the receiver module housing ; and
OTH OTH OTH OTH OTH OTH HEAD 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 OTH OTH