12V battery

Only when servicing...don't leave it unplugged permanently otherwise the security alarm will go off when car is shut down. It thinks someone is breaking into the hood.

 

I will have to try that connector disconnect again, I do remember when I re-installed the plug with the doors closed and locked, hood open obviously (car in "sleep mode" more than 10 minutes after shutoff), the alarm went off - as I had to scramble to find the key fob to shut it off. I had been testing the 12V draw at the time and had left the hood open for a couple of hours monitoring with a meter.
Maybe it does work OK just disconnected, just remember if re-installing it, do so when the car is unlocked and "awake", or try the above to find out for yourself

This was on my 2018 built model.