The bolt comes through the aluminum frame and bolts to the bracket. I am worried about how much effort that will take. Im not sure if it goes through the floor, and then through the aluminum frame, and then into the bracket or what. If it is through the floor, then I think Im gonna let someone else do that. As far as that particular bracket supporting the wall, that particular location is in the middle of a slide, so no wall there. But, if I can get a new bracket, that's obviously alot better.
As far as water behind the galvanized steel, I was thinking of sealing all edges, maybe with sealant tape and then a bead of silicone or something.
For now I've put some expandable foam to fill in the gap up to the inside floor, covering it up with Duct tape for now and then will contemplate next move.
Mike