Equip your semi truck to be Ready for the Road Ahead with the Haldex 7-Terminal Style Surface Mount Junction Box, a key piece that acts as a central hub for electric connections. By utilizing a compact design that acts as a central location for electrical circuits, this replacement device is able to neatly organize connections such as wires, sensors, lights, and more. Built with a simple-to-install box that seamlessly fits into existing spaces. FleetPride is your First Click in Heavy Duty .