Thanks Reynald. I like your solution, but I already put them in the armrest before I saw it. I also returned the 7100NEX and got the 6100NEX. It fits in the stock bezel without any cutting. The 7100 requires an opening that is basically the entire double-din area (100mm x180mm).
This is what I have for now. There is an AUX video-in jack on the left, and two USBs on the right. One is for CarPlay, and the other I have a 128GB flash drive plugged in for media storage. If the location is too clumsy, I'll consider moving them either to the lighter location or near the TEMS switches.
For connections up to 10 Amps I have been using these cheap connectors that you can find on Ebay. They seem to work well. You will need a crimp tool to assemble. There handy for adding connectors to custom audio and accessory installations.