My friends Bob M and Janicholson can better help with that switch, they have pictures n wiring diagrams etc. I cant pack water to them when it comes to switch details etc., but Im knee deep in theory lol
On the Genny if not marked A (Armature) and F or FLD (Field) often the ARM is the larger of the 2 posts.
If you had an ohmeter with decent accuracy on the low Rx1 ohms scale, the post with the highest resistance to the frame ground would be F and the other (A)RM. The ARM sill be very low ohms to frame while the F would be maybe 3 to 4 ohms more.
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