I have a icecap 660, its been years since i had one of these ballast. Last one I bought wired and ready to go. I dont remember if anything plugs into the small 4 sq pin harness on the right of the pic.

Basically if you look at the pic the wire harness plugs into the right. The powercord on the left, but also on the left is a 4 pin spot to plug something else into. What goes there?

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