I installed the Hyundai mobis CarPlay stereo and thought it would just be plug and play but I’m having an issue getting the camera to connect to the stereo. I recently purchased a rear view camera for my 2017 ES from eBay and I plugged the camera into the pre-wired harness that sits inside my trunk but there is no video still when I put the car into reverse. Is there a plug in that I am missing? I noticed there are unused harnesses taped up behind the climate controls near the firewall and under the stereo area but I’m not sure what they go to.