I ordered a third brake light. They sent me a poorly made aluminum stalk and a light with two wires and a connector to put on the wire. The wires coming out of the lamp are a red and white. I will be putting this to the third light brake connector. My question, are these led lights polarity sensitive? If so, how do I know which wire connects to what? There is no wiring diagram, no instructions and I am at a loss on this. Any advice would be greatly appreciated