Okay, so I did some measurements and answered the question for myself. I was able to find Switched 12V on two pins of the black connector which is perpendicular to the white connector just to the left of the ECU in the rear trunk.
For whoever is interested and can use this in the future, I am pasting two pics. One showing the location of the connector and the second a bit of a closeup and the pins marked with solid red arrows.
I measured and both these pins show 12V when switch is ON and the voltage is gone when switch is off. the 12V does not linger as it does in some other places as it is needed there.
Hope this helps someone else.
