This is the new EZ Connector wiring setup. It was designed to save time and keep you and others safe on the road. Essentially, the system uses a strong magnet mounted in the center of each plug end in conjunction with spring-loaded brass contacts to ensure a trouble-free connection between the tow rig and the trailer. The non-corrosive contacts feature stainless-steel springs to keep the pins pressed together firmly whenever the plug ends are together. With this setup, lights and brakes work every time regardless of environmental conditions such as water, snow, ice, or mud. Two large O-rings seal out contaminates and make the connection completely waterproof. Unlike other popular connection methods, the EZ Connector will not break or fail if the cord is accidently pulled apart while in use.