Got wife's car all setup and resolved a few lingering issues.
1. Rear speaker. Removed the door panel. The speaker was not connected. Must have been a problem ever since the car was in an accident, just never realized. Reconnected the wire and it's good to go.
2. Dimmin wire. Stupid Vibe, a Toyota crossover, had the illumination pin just below where it was actually supposed to be. After some googling I was able to identify the required pin and moved it to the proper slot. Now the bottom buttons light up when exterior lights turn on, and the screen auto dims.
Here is the end result of the install. Looks relatively clean compared to what it was before (visible cage sticking out 1 inch past the dash). I wish I grabbed a before pic but I didn't, so you will have to imagine.