Tethering is a way of the past. Then they went to wireless drawbars and now they have DCS.
With 2 dcs boards, you can pair them without having to worry about a wire. If you use the guts from a tiny switcher like the sw1. It leaves room in the hood for a smoke unit.
The rear exhaust shouldn't even be blocked. Mind you, I am taking off the rear unneeded motor. Allowing you to do a very simple duct system.
I also plans to use the reversing headlight wire to put 2 red markers next the the headlight since it will never need one in the other direction. The light will then automatically switch between headlight and rear marker.