Plug connection for Sedan is behind the black side cover
Once everything are connected, you need to reset the Infotainment so that the system will recognize the newly added reverse camera.
To reset, start the car, press and hold the infotainment button, BACK + NAV + MUTE until the screen restarted
Put the shifter to reverse and test if the video will feed. If not, please check your connection in the rear trunk, make sure they are properly connected.