AH! I get it now. I think it's strange "they" didn't provide a circuit to power the ignition during crank but... no matter.
Applying the KISS principal is usually best anyway. As an aside, The Ford starter solenoid from the early 60's with 4 posts, the post closest to the battery terminal connection as you probably know operates the relay.. the one to the right of that is to feed battery power to the ignition during cranking. Or you can also add a wire to the starter connection at the solenoid to power the ignition during cranking.. (if you need to)