[Donjamin]

Having opened up the rear cap on my 2016 3160 to install a backup camera and to rotate the 50 amp electrical connection to accept a dog-bone electrical cord connector, there is no wood backing in your fiberglass shell for your eye-bolt to go into next to either the windows either top or bottom. Your dealing with about a 1/4" to 3/8" inch thickness of fiberglass on the rear cap shell. As others have mentioned, You are just asking for trouble if you think you can secure an eye-bolt though the fiberglass. I'd look for an alternative such as the hitch clamp mentioned in a prior post. That's cheaper than having to do a fiberglass patch job on your rear cap. That's my 2 cent opinion.

Don