hardwire

I have a 2015 Regal T, and I am trying to hardwire a radar detector to the rearview mirror. I poked around with a multimeter, and I'm confident that I found the ground pin. Beyond that, the highest voltage I was able to find was only 10V, and most radar detectors and dashcams require 12V. I'm...

Hi all, I was just wondering if anyone has hard wired their radar detector/ dash cam into the rear view mirror? I am just sick of using the cigarette lighter and having a cable hang down over my dash, I know most people hard wire it to a fuse but I would rather not have to take off the A pillar...