A pulley system is mounted on the tractor for connection with {TAIL ~ the flatbed unit} and {HEAD ~ fifth wheel coupler} 
A pulley system is mounted on the tractor for connection with { TAIL ~ the flatbed unit } and { HEAD ~ fifth wheel coupler }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD