Tapping 12V for accessory above dashboard?

I imagine this is answered elsewhere already in the Prius C forum but I can't seem to find the answer.

I have a dashcam that is mounted in the upper right corner of the windshield, and right now the power cord (5.5V device) runs down through the passenger's field of view to the OEM 12V to 5.5V adapter the dashcam came with, plugged into the cigarette lighter.

What I would like to do, and avoid paying a shop to do, is hide this wiring out of view and attach the 12V to 5.5V adapter to the 12V accessory line somewhere. In order to use this adapter, I'd need the female socket version it fits into, and then I'd need to attach that physically and electrically to the car.

1) Any tips on how to find a spot to tap into the 12V accessory wiring? I searched and could not find an electrical diagram of the Prius C.

2) Also is there a convenient place to route the wire to "through" the dashboard? Is the usual route to go under the glovebox? I have zero experience here.

thanks!

 

I don't see any openings alongside the pillar or at the top/side of the glove box. I took these pictures - any chance you'd be able to draw onto them to highlight where I should look?

 

Haha, like I said - zero experience! Makes sense I would need to remove some parts. Thanks for the help. Is there a correct way to remove the pillar without damaging it?

 

that doesn't sound good. i'm pretty sure there is an airbag in there actually - one of the 9 total?

 

Did you have any issues with the airbag in the pillar? Also is the charger itself visible from outside the car? One of my main issues is there are a decent number of car breakins in my neighborhood and I do not want to have a piece of electronics (charger) - that implies more electronics nearby - showing.

 

I read in another thread that simply unplugging the battery will prevent the airbags from deploying by accident during any operation like this. I presume this means the battery under the hood, not the one under the rear seat?

 

Next question - if I bring a wire out from under the plastic cover over the pillar, what will happen at the boundary between the plastic and the fabric of the ceiling? Will this wire prevent the plastic from sitting properly or flush like it does now? Having trouble seeing how it would still be properly seated at the upper end.

 

When you 'run' a cable along an exposed surface inside the car, how do you attach it? Are we talking black electrical tape, clear scotch tape, some kind of cable ties, or something more permanent? Easy in/out as you say would be convenient but I'm curious how you'd affix the cable securely then.