While the date of 06/18/2016 is a bit of a misnomer because this diagram has been revised at least 8x since then; I had to start somewhere.
This is only meant to paint the broad strokes of the installation so understand that it is not completely comprehensive. For example the chassis grounds and the AV grounds aren't shown for the sake of simplicity. I've also organized this with divisions between the electronics based on physical location in the car. Green = Cabin. Gray = Trunk