With 15 gold terminals total, and the igniter circuits are 14 and 15. With that in mind, count from the other end till you get to the 5th terminal, that should be the neutral side that connects to the 14th terminal, but it may be 15th as I forgot. The power for the relay contactor comes from the hot side which is upwards from the relay and on lower right side of transformer. With power off and after waiting a few minutes you should be able to trace these circuits with your ohm meter function.By 5th pin, do you mean the "pivot" or "middle" pin? Obviously I'm missing either the DC to flip the switch or the AC to go down the power leg. Any idea where the AC would come from to go to that lower pin (in your picture) that's connected to the gold contact?? I'll plug the board in and see which current I'm missing so I know where to go from there.
Thanks a TON for your time and your pictures. I sure appreciate it. Make your next one a double, on me.