I cannot speak specifically to your system, but I can give a generality. Some head units will have a ground wire that connects to the brake system. When the emergency brake is engaged, it lets a ground flow through the system as an indicator that you are stationary. In the systems similar to this, you can bypass the safety switch by connecting this wire to constant ground. You will have to do your own research on your specific system to see if this is the case for you.
2018 Rockwood 2304DS Ultra Light pulled by 2018 Ram 2500 Cummins Diesel 4x4