How to calibrate the ESC, and where is the safety switch?

Pixhawk
1

G-d willing

Hello,
I am building my first drone using Pixhawk 4. I flashed it with ArduPilot FW and I am trying to calibrate the ESCs. For that, I need to press the safety switch. Is that the button on the GPS that turns a red color?
Does anyone know the correct process for it?

Thanks

2

For help with Ardupilot, best to ask at discuss.Ardupilot.org