Ok, so this evening I had a chance to pull out he multi meter and check the board. Pics aren't great, but what I found is that the 4th hole, in the line of 6, when touched by one probe and then touching the top part of the contacts seems to be the common as the meter zero'd out each time on the top row of contacts and the middle row of contacts. So that means that ironically, #4 on the switch wire is soldered to the 4rh hole as the common and the other 2 wires each go to their respective contacts.
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