One wire alternator nonsense

Ok...I’m really in the weeds now. So this thing has the dual ballast, which isn’t being used. There is a black/yellow wire coming off the 5 pin plug for the OE a ignition box. Somehow, that wire ends up going to the farm plug, which ends up at the coil.

I hope that makes sense. I can’t see how that black/yellow wire can end up at the coil when there isn’t power to it, as it’s not hooked to anything.

So my question about that is...can I take the blue wire that is in the top left position of the ballast resistor and just run it to the coil negative? It is a switched 12 volt source, and that’s all the box needs to run. Then what do I do with the rest of the wires coming off the ballast and the wires going to the plug that goes to the ignition box??

I’d like to just eliminate what I can to clean this mess up, and still have everything work.