The backup camera on my wife's 2016 XJL Portfolio has somehow receded into the bumper. How do I reinstall? Must I take off the bumper? Or can I access the camera by another easier method, like take off the latch? Thanks for the help. Lots of threads about cameras, but so far none of the details how to install them or reinstall it. Camera is still working oddly enough. Lord knows my wife needs that back up camera for such a long camera with poor rear views from the small window.