I completley gutted the entire car doing a v8 swap. I want to use my old gauges (minus tach of course) that were in my cluster. Does anyone know how to wire them up? There are 3 studs that made contact with the circuit board inside the cluster, but all that is gone. I assume 1 = ground, 1 = +12 adn 1 = input from sensor. Anyone know which is which?

Thanks.