Indiglo Gauges...HELP w/wires!?

Ok, I got these indiglo gauges for my Civic (96' 4dr EX), and they came with these piss poor instructions. Anyway, I have managed to do EVERYTHING right up until the part where it says "Connect the wires to he headlight power supply. (red wire for the positive electrode;black wire for the negative electrode)" What do I need to so after this!? Where is the headlight power supply? Where does this Red wire go and where does this black wire go? Someone please help me with some detailed instuctions that are better than the ones that I have here. Thanks so much!!