[drive_a_legend]

In the fuseboxes, several places are unused - but available.
Is there a scheme where is indicated which fuses are constant 12V and which are ACC?
Mu volvo has a dash cam on a fuse-a-tap but dealer says it's causing interference (computer gets nuts because current is drawn when it 's supposing its shouldn't be drawing current)

EDIT : I'm referring specifically to the 'empty' ones (which are filled with spare-fuses)