I dont have time to look it up but this is for all the first time towers. When backing up the trl for the first time hold the bottom of the steering wheel when back and it makes it a lot easier. If you want the trl to go right steer right and of course the opp. for left but if only holding the bottom of the steering wheel.
Oh just in case you dont believe me i was a long haul truck driver for 9 years and have backed up many times.