Hi Robert and welcome to the RVUSA forum. I can't answer your question but you might re-post it in the "Towables" section where the trailer guys will see it. Ken from Grandview Trailer can probably help you with your problem. Good Luck!!
You should be able to find a wrench socket or something close to that under the skirting on the opposite side of the slide. Not that familiar with Cameos, but they are all pretty much the same in the manual cranking.