Hi, I did install a mirror and camera in my 2014 SRX, parts taken from a wrecked AX4 model 2019, the camera P/N is 84510303 but it doesn't show individually, according to GM it's part of the complete spoiler assembly P/N 84517274 which cost a lot. I was lucky to find a AX4 at a local salvage auto parts shop.
The Mirror P/N is 13530414 and it is the second generation, it is drop in replacement to the existing and uses the same plug configuration, didn't had to modify anything, took five minutes to install
Fitting the camera was a nightmare, I made the setup very similar to the AX4, camera is fitted into the rear spoiler, so I had to remove my SRX spoiler and made a small cutting and glued the camera!
I used 4.5 meters RG316 Cable with male SMA connectors from both ends, had to replace the camera and mirror Farka connectors and used Female SMA connectors, the reason that I couldn't arrange Farka or SMB locally and didn't want to order it and wait...
I have checked the original cable and it is indeed 50 Ohm, the camera is receiving DC power over the same coaxial cable which is used by the camera to sends the video to the mirror perhaps in the form of high speed data, similar to a GPS antenna concept, video is crystal clear, no lag, has a superior night vision capability, no flickering, noise or vibration...it is superior by all means.
I was worried only about adjusting the camera horizontally, the mirror has features like adjust tilting, zooming as well as adjusting brightness level and it is bright enough in day time at the lowest brightness level.
Setup is straight forward, did not require to do any sort of programming, took about 3 hours to furnish the cable, install the camera on the spoiler and drop the cable, it works!
Best of luck to all