Sorry I didn’t see this post until now but if your camera is similar to mine, follow these instructions to avoid dealing with the backup lights, which add another painful step to the installation process.
On the long RCA cable there are 2 little red wires on the yellow plugs. On the end that goes into the stereo, attach that little red wire to the AMP turn on wire from the stereo (or another 12v switched ignition source). On the end for the camera plug, connect that little red wire to the red wire on the power adapter. Then connect the ground on the power adapter to a screw on the liftgate handle or another metal grounding point inside the lift gate. Now your camera will be powered whenever your stereo is turned on. If your stereo has an RCA input for a FRONT camera, you can use an RCA Y-adapter (splitter) and plug into both the rear cam and the front cam inputs. Then you can see your rear camera even while you’re driving.
Keep in mind this solution only works if your stereo has a CanBus system that automatically detects if you’re in reverse (and brings up the backup camera screen). If your stereo relies on the camera to sense power only during backup, you’ll need to tap into the reverse lights. Most of the Android stereos from Amazon have a CanBus box that will automatically switch when you enter reverse.