There used to be a plug and play option available from Tekonsha with their 3027-P adapter which would allow you to use one of their controllers like the Prodigy P3 # 90195. Since that is no longer available from Tekonsha you could cut off the factory connector and wire in the Controller # 90195 or use a trailer mounted option like the Autowbrake # 3430001 you found. view full answer...
I think you are overthinking this one Robert. On the Power Control Box for Thomas Payne Seismic Recliners and Sofas # LC36FR there is a main connector coming out of the control box that can be disconnected about 6" outside of the box. I have included an image of this for you below. view full answer...