The different color codes provide for {HEAD ~ easy identification} of {TAIL ~ the proper location} for the rail assembly 
of
The different color codes provide for { HEAD ~ easy identification } of { TAIL ~ the proper location } for the rail assembly
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH