{HEAD ~ a housing} that defines {TAIL ~ an opening} at a first end configured to receive the insertion member, wherein an upper inside surface and a lower inside surface of the housing define a plurality of slots, wherein an interior side surface of the first end of the housing defines at least one ledge, and a rear wall of the housing defines a plurality of openings; and 
defines
{ HEAD ~ a housing } that defines { TAIL ~ an opening } at a first end configured to receive the insertion member , wherein an upper inside surface and a lower inside surface of the housing define a plurality of slots , wherein an interior side surface of the first end of the housing defines at least one ledge , and a rear wall of the housing defines a plurality of openings ; and
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH