This picture is barely legible, but it may help. I added the hand written numbers because the originals are so tiny.....just realize I can't be certain which is a "6" or an "8". It almost impossible to tell the difference.
It's hard to read, but if you move clockwise from the engine....you have the tach, tailight, brake lever, headlight, speedometer, key switch, throttle, voltage regulator.
This is from a 1975 manual.
You could also search:
www.vintagesnow.com/Sno-jet.html and see a better picture, or different model years, of the wiring diagram.
Rick