As may be noted, in particular from FIG 8, {HEAD ~ the means} 40 are in part hidden via {TAIL ~ the plug} 20 and in part received in the cavity 41 
As may be noted , in particular from FIG 8 , { HEAD ~ the means } 40 are in part hidden via { TAIL ~ the plug } 20 and in part received in the cavity 41
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH