7-way Trailer Connector Wiring | Subaru Ascent Forum i'm trying to figure out how/where to connect the extra wires for a 7-way trailer connector wiring on my 2019 subaru ascent (premium). I am purchasing a pop-up tent trailer that has electric brakes, so am hoping to make things safer when towing.Electric brake controller wiring | Subaru Ascent ForumJul 09, 2018Trailer Brake Controller info request | Subaru Ascent ForumJul 02, 2018Trailer Hitch Receiver | Subaru Ascent ForumJun 28, 2018Ascent Trailer Brake controllerJun 25, 2018See more results subaru trailer wiring | eBay 56367 Curt 4-Way Flat Trailer Wiring Connector Harness fits Subaru Impreza (Fits: Subaru) Brand New. 5.0 out of 5 stars. 1 product rating - 56367 Curt 4-Way Flat Trailer Wiring Connector Harness fits Subaru Impreza. $73. List price: Previous Price $91. Buy It Now. Free Shipping. 20% off.