Here is the build pic of our trailer and then when I started to modifying the tongue. In the mod photos I had removed the propane base and was checking the layout as I moved it back. You can see where it was when stock due to the rusty holes. The trailer was only a few months old. The final picture is with the new dual battery rails and the propane base welded into position as close to the trailer wall as practical.
So many modifications...so little time.