Scooterotica

What's the best way to wire up a full DC system that will turn off completely when in the off position on the switch?

I want to power the MB speedo from the ignition as well.
The only way I can see with the ignition switch I've got (P 0 1 2 3 ) is to run the lights off the black which powers the speedo bulb and rear lights in the P, 2 and 3 positions

Am I missing or over looking something?

I always run with lights anyway so set all gauges to position 2, pilot and rear light.

I always ride with the lights on as well, so never really use position 1 anyway.

Just wanted to check I wasn't over looking anything before I make the loom.