I can't go by letters. Here is what I can tell you and I hope it helps. SS1 will have a gray wire foing to it, SS2 will have a brown wire go to it, and SS3 will have a yellow. All three will also have a white wire. The white is the power wire, and the others are the signal wires.
Let me know if this helps.
Joe
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Saturday, August 7th, 2010 AT 11:45 PM