My '71 A65L wiring diagram shows a 3/4? way ignition switch.
The diagram is very poor, as is the description and all of the switch innards; whoever drew this didn't have a clue.
The key ignition/light switch has 3 terminals: 1 (N/G)is the feed from the battery/rectifier. 2 is (W) ignition, flasher unit . 3 (N/G) is pilot, rear light and instrument lights.
The rotary switch on the headlamp shell appears to be #11 shown as 'Switch'...no description.
So, what does switch #11 do?
Answer: (position 3) It is normally open, (ignition OFF) pilot light and rear light ON. (parking/breakdown emergency lighting).
But, in position 2 just the ignition is connected via R/H handlebar switch. (W to W/Y).
The engine is now running and you need lights. Switch #11 turned on, connects a U (blue) to the N/G.
Engine running, pilot on, dipped light on, rear lights on.
You could use the main beam by flipping the flipper switch, Pilot light is always on.