I have a light bar I'm trying to install on the back of my pontoon for night swimming, like in a slew. I wired the lights the front lights to a switch. The original wire harness has a button it can go to. Last time I cut the button off and used a butt connector to connect the white cord to the switch and it worked fine. (The switch had a white black and yellow) which colors do I need to connect to this new switch to make the switch work for this light?