If you research this forum you might find that the best recommendation is to align the hooks with the arms like purpony did. That prevents bending of the loader.
I too have a trailer hitch in the center of my loader but I have welded it on top of the loader. I also have a metal bar, about 3/16 by 2 inches) welded vertically on the top ot the loader to prevent said bending. There's a three inch gap in the center of the bar and the trailer hitch is located there. The vertical metal strip required me to put the hooks on top of four inch lengths of square tubing.
I've also fabricated a boom and determined that it will at least take my 200 pound weight without bending.