I have been using that concept for years. I have them on my log splitter, which has an electric winch on a swinging boom to lift large chunks onto the splitter. Works well. Both the winch and battery box are mounted on stubs. That way I can use the winch on other machines. I also have some on trailers for tongue jacks to use a stabilizers and such. All my trailers have a removeable hitch which makes them a bit harder to steal and I can change from a ball hitch to a pin hitch in a snap.
Good idea.
Ben