{HEAD ~ Pins} associated with {TAIL ~ the housing seat} through selected apertures in the bar at a determined position 
associated with
{ HEAD ~ Pins } associated with { TAIL ~ the housing seat } through selected apertures in the bar at a determined position
HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH