Where do you get the on/off reference to go to the relay? With the stock wiring having only 1 connector going to the headlight assembly, I couldn't figure out how to tell the relay when to turn everything on.

This relay I bought is the only 1 that I've seen with 2 on/off cables, I assume they are both wired to the same pin (well that have to be)

Here is a crappy image to try and explain what I mean...