Back attachment shell on floor replacement
I have been replacing the rear bath floor due to RES/rotted floor. I am to the point where I will be inserting the new ply. Before I do that I have a concern about the rear end plate. The aluminum channel is attached to a steel plate, which I may or may not be the "rear end plate" at the very back of the trailer. The exterior belt trim has rivets that go through the exterior shell. These same rivets at one time were attached to the end plate; however, they are now unattached. I have not done any riveting yet, but I do know which Olympic rivets I will be using and had ordered some. I tried to rerivet with -7 size to no avail. PO had done some plumbing work in the rear at some point, and I am wondering if these rivets were placed by them or if they were original. If they are original, how do I rerivet effectively? Thanks for any and all insight. It's a 72 Trotter.