The bracket is in turn affixed to {HEAD ~ the ends} of {TAIL ~ two lower slide bars} and one upper slide bar arranged in a triangular configuration 
of
The bracket is in turn affixed to { HEAD ~ the ends } of { TAIL ~ two lower slide bars } and one upper slide bar arranged in a triangular configuration
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH