ok, this is pretty strange request, you have what? jsut wires, on their own....? connected to something? a PSU, is it in a computer... or do you just have two wires on the desk in front of you....
Anyway, if your talking about a PSU, then the red wires are typically 5v coming from any molex or ATX connector. If the wires copme from a fan header on the mobo then the red wire will be 12v....
There isnt really any modding you can do with it, they are just wires with a voltage difference across them. You connect things to them, like LED's or fans....... strange person
dragon