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