The Calli III wiring without electronic ignition has the live wire (brown and white) feeding to both coils (+) with the points connected to the points (red/yellow or red/green) from the terminal marked R (-) as shown below
My own set up below has electronic ignition which is probably similar to your own, the white wire is the live feed (+) and the red and green wires are the triggers from the electronic ignition box that earths them when the lights in the contact breaker tell it to do so.
If you would like the full wiring diagram see my thread here (you have to scroll to the top!) or send me a PM
Best wishes
Chris Cumbers MGCGB
Branch Liaison Officer