Trailer brake controller is a 2x2 arrangement - not an inline. It's more like the top connector.Isn't that where the brake controller plugs into the factory trailer wiring?
Yes and so far, I don't believe we recognize it - unless it's something to do with the bed outlet control switch (assuming you don't have a 110v bed outlet)I’m asking about the other one. It’s the SMALLER of the two. The black connector.