Not sure if it is the best tie down method but this works for me. My equipment trailers have Rails.
I place my 1140c in 4WD and pull up on trailer until front tires contact the trailer front rail. I run a heavy ratchet strap 1700lb working load through the cab leading forward to my tie down points on the trailer and tighten strap a little. I then run the rear strap through the cab leading to the rear and tighten. Finally I tighten the front strap the rest of the way, set parking brake and close both doors.