I am working on the installation and powering of a small dash cam on our 2018 RTL. I have a two port USB/volt meter to go in a blank switch position and will power it for the GPS2 wire under the seat. This will be my first big tupper ware removal to get at that unused power source.
This camera has a battery that allows for a orderly close out of the video if it triggers it's G-Force video capture. And when the main power goes away it does an orderly shutdown. So with key switched power source it will come on automagically and shut down on its own.
I glued it to a shaped stiff foam piece and glued that to the top of the dash with Welder Glue, which is a rubbery glue similar to shoe glue. I use the Welders Glue on my RC airplanes for a lot of things.
https://www.amazon.com/gp/product/B...n_title_o00_s00?ie=UTF8&psc=1#customerReviews
Drats, sideways pictures again, however this time I found that if you scroll down on manage attachments you can delete photos, and start over!