I just bought a used NOS wet kit and it didn't come with any instructions. I have a few questions about the electrical connections. I understand you need a + and a - to open the fuel and N2O solenoid. I will be using a FPSS, WOT and an RPM Window switch. I know the window switch has a dirrect +(red) and -(black), Tach wire (white) and another yellow wire.

1. Is that yellow wire from the window switch a + or a - signal?
2. Does the WOT get a + in and a - out, or a ++ or --?
3. Same for the FPSS, + in and - out, or a ++ or --?

Further, my bottle heater didn't come with a relay. I got two 30amp, 5prong relays with this kit, can I use one of them for the heater and the other for the N20 system??

And the last question is how do I hook up this relay?? I've looked on two diagrams and they were both different. Thanks.