I can't find the right button for the solenoid starter, help please :)

[Riley W]

So I did get the kart running but I forgot about the ignition switch that I bought, I don't really know what to do with it because I connected it to a colors-matching plug and forgot about it. When I turn the key it doesn't do anything (which I expected since I have no computers or anything hooked up) but I just installed a trail tech vapor and I want to be able to turn the key and make the led on the vapor's screen light up. How do I do that?