How to connect the DVR to the rear view camera?

I bought the camera separately, in it a video signal cable with a tulip connector. As a result, I bought an additional adapter from a tulip to a mini-jack to connect a video signal cable to the recorder.

The camera came earlier, had the opportunity to check at home on the TV, the camera with the TV worked.

But after connecting, the image does not appear when the reverse gear is engaged, only the image from the camera of the recorder is displayed on the monitor. Electricity is connected, everything seems to be correct + / _ from the camera to the +/- reversing light, (showed to an electrician) that everything is correct.

The only doubts are the two red wiring (process) on the video signal cable (tulip) on both sides. As I understand it, they are needed only when connected to the built-in radio, did not connect them, or do I misunderstand? What is not connected correctly and why is there no video signal?