Yes, what i have done is a 3-way switch.
View attachment 58759
'1' directs car ACC to HK3 Battery.
'11' directs car Battery to HK3 Battery.
'0' is off, obviously.
Putting it in '1' acts like the camera is connected to cigarette lighter power, turns on when car is on, turns off when car is off, regardless of parking mode settings in the camera.
Putting it in '11' acts like the camera is connected to the HK3, everything will follow the settings in the camera, Time delay to switch to parking mode, motion and g-sensor sensitivity, max recording time, and the slider on the HK3 for voltage cut off.
Putting it in '0' is off, regardless if car is on or off.