I'd be inclined to bolt it in with nylock nuts on the inside of the box. Even if you were away or something and they got underneath with an electric wrench they can turn till the cows come home it ain't coming off. Its a kick in the nuts all right since I got hit I think like a thief now and design 3 or 4 steps that would fug the average tweaker up to a successful hit at chateau Salty any more!