A Curt Manufacturing custom wiring connector (sometimes called a T-connector) is a simple, plug-and-play electrical device that eliminates the need for cutting, splicing and soldering when installing vehicle-to-trailer wiring.Most vehicles do not come ready to tow. Unless your vehicle has a towing package, it is probably not equipped with a trailer wiring connector. This is where Curt Manufacturing's custom wiring connectors come into play. A custom wiring connector uses a single original equipment plug to plug into a special socket provided by your vehicle. Though this option is not available on every vehicle, some automotive manufacturers design their vehicles to be easily equipped for towing by supplying a socket, integrated into the vehicle's electrical system, to readily accept a custom wiring connector. With a Curt Manufacturing custom wiring connector, there is no need to tap into the taillight assembly because a special socket is already provided.This custom wiring connector provides a 6-way round connector socket and is designed to be a custom wiring option for certain years of the Ford F250 or F350 Super Duty (to verify your vehicle compatibility, see the Curt Manufacturing application guide at curtmfg.com). Curt Manufacturing custom wiring connectors are designed to be long-lasting and simple to install. They come with dust covers to keep your connector clean when not in use and feature a one-year limited warranty to give you peace of mind.