I am replacing the speedometer on my boat. The new gauge requires a ground, constant 12v and keyed 12v., They attach to the gauge on 3 big screw posts. The posts are in kind of a triangle shape. The other gauges on the boat have a plug that connects to all 3 posts on the back of the gauge with a wire for each one going. I would like to match that if possible but can't find that the hell it's called. Sound like anything anyone recognizes?