Pictured above is the wiring diagram for the Model A as illustrated in Dykes Automobile and Gasoline Engine Encyclopedia Supplement, page 16.
Note that this image is the corrected version, not the one commonly seen on the internet having the internal mistake in the starting motor brush connections.
Thanks to John Brady for cleaning up the image and adding the color coding to match the Ford schematic and allowing it to be used here on Ford Garage! Great job!