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