The conducotrs have all the same guage. There should be a wiring scheme with the rotor and the control unit. Just choose your own layout of colors and hook up to the according terminals. Use the scheme provided and mark the colors you choose on it. Like when you hooked up the rotor, and sealed it, go inside and take the scheme with the colors you noted there and hook up the control accordingly. The thermostat wire is really not expensive, and most places sell it by the foot. Dunno if Lowe's has it. Look at the scheme of how many conductors you need by how many terminals the rotor has.