I picked up a set of US-Ellipsoids for my 318is, and forgot to grab the connectors. I bought a set of universal connectors from CT, but these don't show any polarity (-,+), just two black cables.
I know the Brown is my Ground, and the Yellow\* is my power, and the white\purple is to be pigtailed off (for highs). The only thing is I don't know what side of the bulb is +, and what side is - to wire the connector. Does it matter?
Say this was the light bulbs. I currently have the + on the connector at the right side of the tab\s on the bulb, and my negative is on the left side of the tab\s.
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