PC Br 411 Battery Switch?

Can any one tell me where I can find the battery switch on the BR 411?
I've looked everywhere in the cab, but can't find it.

(I'm using a timetable mod where it starts completely dead)

 

It is inside the cabinet under the volt gauge on the right side, the switch is next to the key

 

Thanks, found it earlier, but there was no text popup, so I didn't notice it at first.
I also didn't realise I had to get out of the drivers seat first in order to turn the battery on.