you can connect the red and black wires for the amp meter together, and insulate that connection well. make sure you secure it well out of the way and you can forget about it. Then all you need to do is run a power wire from the accessory bus and hook it up to the volt guage and then a good ground to complete the circuit. pretty much the same as wiring a lightbulb, which i assume you will need to do to power the back lighting for the gauges. For this circuit I just tapped off the dash dimmer circuit.