The picture does no justice to how good this install looks in person. I will tell you the CB is a tight fit in terms of depth, but it fits fine. If there is such a thing as a 90° coax connector, that would help but is not crucial. Also the lower sides of the double DIN mount I coped those with a knife to match the profile of the CB's faceplate.
The receiver has Bluetooth, hands-free, Pandora, USB, AUX, and AM/FM. The CB has weather, scanning, and dual-watch. I have a FireStik door jamb mount at the hatch, which gives a mounting location just above a "tail light mount". On the mount I use a quick-disconnect, and alternate between a 36" Firefly and a 48" FireStik II, depending on conditions.
The coax I run through the taillight grommet, and on through the cab under the door sills and trim panels, on up into the dash. I cope out a small round notch in the top of the taillight housing so the taillight mounts back up tight without impingement of the coax. That I accomplish with a few strokes of a chain saw file on the plastic lip.
In closing, my opinion of AUX capability is that it's overrated & outdated. Sure, if you pony up for an updated HU of course you want it have an AUX jack, but personally there are so many better options i.e. Bluetooth, USB, SAT, or Pandora. I have AUX in all three of my vehicles and I can't recall the last time I jacked in. Of course if all you have is an old MP3 player, which I do, AUX is what you want. But with a smartphone paired to a Bluetooth capable HU you'll likely never use it. USB is probably my go to, and Pandora is excellent as well, so long as you're in a data coverage area. Otherwise yes I want it be there, but it will likely never be used. YMMV