ACC connection in the boot?

[Chris - SWE]

Hi all.

Currently trying to hardwire a U3000 dashcam with the iVolt Extra battery in the boot.
Since i want to secure the heavy dashcam battery in the boot that means i need to find a "ACC" connection somewhere close. (ACC = Trigger signal when the ignition is on)
The fuse box closest to the battery seems to be always live on all positions.
Tough i ask the experts here before i start trying to place a new wire from the front passenger footwell all the way to the back.
(Trying to avoid removing the side wall in the boot, since i'm not conformable doing the procedure)

Any feedback is much appreciated.