Normally, on that year, there's no retaining ring.
Has it been modified to have the torque limiter gear?
Doesn't look like it to me.
Extra washers or that retaining ring will just bind up the gear if there's no clearance.
I think the paint marks are just QC marks, they're not needed for anything and there are similar marks elsewhere.
Caution, powering up the ignition system for hours on end will burn up the ig module (TCI, transistor controlled ignition)
If I remember correctly, basic ignition theory 101, apply 12v to the coil and break the ground connection you should get a spark... just wet your finger tips.

BIT 102, you should get a volt or 2 from the pick up.
For testing, you don't need the stator hooked up. Just charge the battery when needed.
You need at least 10v at the battery while starting or it won't start.