The power take off unit 20 may selectively couple to {HEAD ~ the accessory} 16 to deliver {TAIL ~ the torque output} thereto 
to deliver
The power take off unit 20 may selectively couple to { HEAD ~ the accessory } 16 to deliver { TAIL ~ the torque output } thereto
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH