Review on Eway Tailgate Definition Reversing 2007 2014 by Peter Bates

I don't understand how a manufacturer could go to the trouble of making a mold that fits perfectly on the back door but doesn't have a connector (or at least an adapter) for the stock wiring harness. It would be nice if their little black four pin connector had some kind of pin diagram for us DIYers so I could set it up and get it working and not have to try to figure out which wire goes to camera ground. FML people! It's like, why bring the punt back from its end zone to the 5 yard line and stop?