I know this is an older post, but I am looking for ideas to add a hitch to my M1010. Did you ever get one installed on yours? I was thinking that maybe you can add the pictured adapter to the bottom side of the M1010 rear bumper. Bolt it in place and then weld it as well, then place some heave bars/brackets to help reinforce it. Not going to be towing anything heavy as I have a M1028 for that, just a M101A2 trailer at times for show. So it does not have to be super heavy duty.
Sorry about the crude photo shop, but that at least gives the idea where I want to install this.