There's plenty of info out there but most of it seems to be related to coaches that have the factory trailer harness. Ours does not (at least it does not have that RPO in the glove box and I don't see any additional wiring inside the LR tail light access or along the rear frame rail). Is there a guide on how to tap into the existing chassis circuits the "right" way? The driver side plastic panel is off right now so it's an ideal time to attack this.