a housing that defines 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 {HEAD ~ a plurality} of slots, wherein {TAIL ~ 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 
a housing that defines 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 { HEAD ~ a plurality } of slots , wherein { TAIL ~ 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
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 HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL 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