So I'm cleaning up some things in the car and decided to add a relay to power some accessories like two step etc. I have some 3 post rocker switches that are illuminated and I wanted to check to see how they should be wired? I'm thinking one post is the ground for each switch, the other outside post should be the power received from the accessory post of the relay and the middle would be power wire to the accessory... Is this correct or am I missing something?