Wiring Stereo For 87 Bronco

Im trying to wire in a new head unit into an 87 Ford Bronco and I seem to be missing something. Keep in mind this is my first time wiring a radio in 5 years, so this will probably be the dumbest question you've ever heard. 87 Ford Bronco Wiring Diagram I've got everything hooked up except the Right Rear wires. According to this diagram I should have (2) pink/blue wires right? Well, I can't find the other one anywhere! Do I have to hook these up in parallel? I wouldn't think so since it also calls for (2) BLACK/ white wires which I found. So, I was assuming that there would be (2) pink/blue wires, but this is not the case. Here are the wires I have left from the audio loom in my dash: - GREEN/ Orange = RR(-) - ORANGE / Black = ?? - Light Blue/Red = Illumination?? - Dark Blue/Orange(maybe red, I didn't have the best lighting in the world) = ?? Anybody know what I should do or what I am missing ? Thanks for reading, - Dave

Edit : Sorry guys. I probably should have posted this in the 'Vehicle Information Request' forum right? Well, since I cannot edit or delete posts , hopefully the admin will move it? :) Sorry for the mix-up.