Dash Cam Installation

[dangerdred]

I've the glovebox out now more than a month after fitting a bluetooth media module. I had been thinking of buying one of those upgraded video capable head units off €bay but then changed my mind, but I do definitely want to fit a dashcam. After looking quite a bit I've not found any straightforward how-to on this. I have the camera, a 12v/5v converter, and a battery drainage protector so I can wire the cam in to be on all the time. It looks like a lot of work removing the A-pillar trim to route the cable down to the passenger side fuse panel, so I then had a look in the overhead light console but have not found an always on 12v line. Can anyone point me in the right direction or share what they did?