SIMCONNECT control of external power in Dreamliner

I’m working through being able to control my way through the checklist from a button panel using Simconnect and on the Dreamliner, I’m trying to find if there’s an EVENT for firing up the three external power switches. There’s an in-game keybind that works - or I can click with the mouse, but can’t seem to see which EVENT does the same thing.

The master battery, APU switches and all the rest can be done…

Any help is much appreciated.