Hi all. I know there are tons of posts about master switch wiring and I've looked at most of them. I understand the general goal, but hope someone can answer a specific question.

I have a Longacre double-pole switch with a large normally closed contact and a small normally closed contact. As I understand it, the proper way to wire this is with the large contact for the Battery cable and the smaller for the alternator field current. By breaking the field current the alternator should stop producing power immediately and prevent damage to the alternator.

My question is, based on the attached diagram, which wire should I run through the switch to kill the field current when the switch is opened?

It seems to me that it is the BLK/YLW wire from Main Power Distribution to the ALT.

Thanks

RORY

PS Please chime in if you feel I need the 6-pole switch with the resistor in order to protect me alternatorrsz_civic_si_alternator_wiring.jpg