I really hope we can have a sticky regarding all the sound system wiring diagrams. Enclosed is a PDF of the wiring diagram of the premium, audiophile, and rear entertainment systems.
https://drive.google.com/file/d/1gJ0...ew?usp=sharing
If PDFs are hard to read; I can easily make images out of them.

 

The entire wiring diagrams, from which these came, are available in the stickies... The first sticky, scroll down to Electrical - Guides