Installing Mirror Dash Cam and Back up Cam on a Toyota Camry

This is how I installed my dash cam/reverse camera with completely hidden wiring on my 1999 Toyota Camry. I have no electrical/automotive experience but was able to figure this out with a few days of research so let me know if this is helpful.

Link to wire splice tutorial:

The Correct Way to T-Splice an Automo...

Link to dash cam I used:

https://www.amazon.ca/gp/product/B07H...