Hmmm... not sure I completely understand it, but I load mine on the truck flat bed. A little tricky at first, I put markers on the sides and try to back into alignment, centered...
With the Tie downs, I have fast jacks, it's always off a little bit each time, but basically centered. I put tape down on the bed at all four corners in a "L" shape for the mat to center and then center the camper on it. Usually within a 1/4 inch or so.. and it stays put. Make sure you have the proper setting for the tie downs, not too loose, not too tight.
Hope that helps..
