I found this available on eBay.
On mine, and I should've photographed it, the blue and white wire come off one tab, and the black wire is connected to frame ground with a soldered jumper, and also to the other tab. So they have grounded out the lighting coil.
I think I will try undoing the manufacturer's mod, and restoring it to the above configuration to see if I get my power option back.
After all, I bought this kit to tinker with.
I'm also going to be learning more about how the CDI is triggered and possibly playing with adjusting the ignition timing electronically.
EDIT: 11/11/2018
I know this is not new information to the experienced guys here, but I'll share what I did and found today anyway.
Though my magneto came with three wires, it is really only a two-wire magneto. I unsoldered the black, blue and white wires from it today and checked the resistance. The two tabs are isolated from ground, and show a resistance of about 550 ohms through a single fine winding each end of which is terminated at the two tabs. There is no winding on this magneto for lights. I think I'll order one from eBay that seems to have a functional white-wire coil and after testing it, take it apart to see what the winding looks like. (I hope it consists of larger enameled wire wrapped around the first winding so it's easy to get to.) I think it should be easy to add the 6V or maybe even fit a 12V winding on these.
If anyone already knows all the construction details of these and wants to share, please do. I bet it's already in the forum posts if I do some searching, huh? LOL. I'm such a newbie here. I already found a post by Crassius where he discovered the same thing about the blue and white wires being common. In my case today, when I reassembled everything, I decided to removed the white wire entirely. While it might one day serve as an emergency replacement for the blue, it probably won't, and I'd rather remove stuff that isn't functional or being used.