Hey all, I'm going to the track in 4 hours and have everything done but this switch. The one wire it says goes to your ecu input. So, like where is that?

And if I jet down the fuel, will I be running a larger shot of nitrous. Kinda like more of a dry kit? I kinda wanted to run a 200 shot today. But will stick to the 150 if I have to.

Thanks,
Jason