I think I'm not explaining it correctly.
I have a Tow Dolly with electric brakes. The tow vehicle will ride on the tow dolly with two wheels on the dolly and two on the road (the back two). My vehicle brakes aren't going to be in play here.
When I press the brake in the RV, I want the electric brake on the tow dolly to activate. The wires to control the tow dolly brake are connected at the hitch receiver when you connect the trailer lights.
Maybe I need a different type of brake controller than what you have for a TOAD.... Sounds like its an entirely different setup. Guess I better just take it in...