Take the link in my signature for the original build.
After getting the flat bed done I needed to reconfigure my backup hitch light assembly. The trailer plug mount was now gone cause that was mounted under the factory bumper. I mounted it on the hitch assy. I also added a little more protection to my hitch light assy. I also added a backup alarm. I then made the box to house the relay for the backup lights.. So I tiged up thisall alum. box and made a cover all out of alum. It is now sealed with some silycone and screws down nice and tight. I have also since painted the class 5 receiver.