Having proper wire connections to your trailer and vehicles a priority. That is why Maasdam provides you with the most common wiring connections in the industry. We offer three wiring kits and two adapters. The Maasdam 4-way Flat 60-Inch Connector works with the vehicle end. Made of 18-Gauge bonded wire, the wires are color coded so you know which wire will light your turn signals and break lights. The ground wire runs the entire length of the unit.