Some on the MOC have made a dual receiver type hitch fastened to each IBeam for a cargo mount on the back of the fiver. A search may lead you to one or more of those previous posts. If you are inquiring about the factory receiver hitch on some Montanas ... I wouldn't trust carrying a package of paper plates on it ... if you get to looking, there just isn't anything to it ... the welds are pathetic.
Here's just one of many posts with a few photos on adding a rear cargo deck.
http://www.montanaowners.com/forums/...enerator,mount