The pink wire is suppose to be for the brake switch, so you can watch an image while the brake is applied, you can simply secure it to an earth instead so you can have constant imaging. As for the reversing wire, this is if you have a reversing camera, it will show a display of what is behind you, if you don't have a reversing camera, just block the wire off.
Safe travels and remember, we are here to help as best we can.
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