4 pin vs 5 pin?

BigBlockMopar28 said

I had no idea about the primary side and such on that ballast, so its untelling what side i've had it hooked to and all.

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My resistor has a hole next to each set of terminals and the connectors have a plastic pin that goes into it, so they could be switched left to right, but will always land on the correct side of the resistor.