Install your Hayes electric trailer brake controller quickly and easily with this custom wiring adapter. One end plugs into the controller, and the other plugs into the built-in port beneath your vehicle's dash. Features: Plug-in wiring adapter allows for quick, simple installation of your electric trailer brake controller. No cutting or splicing required. Custom connector end plugs into the built-in port beneath the dash of your vehicle. Opposite end plugs into the back of your electric brake controller. Compatible with time-delayed and proportional brake controllers from Hayes.