Designed for brake controls that have a wiring port built into the back of the unit. Simply plug the brake control end of the wiring harness into the back of the brake control and the vehicle end into the trucks port. Brake controls that utilize the 2-plug style of wiring harness will be identified with the Plug & Play logo. Ideal to make trailer towing safer and easier. Made from the highest-quality materials to last for years to come. Drilling required Mfr. 1 year limited warranty | Cequent Tekonsha Custom Wiring Adapter for Trailer Brake Controllers - Toyota