How to connect intercom?

Question

CCTV

They gave it in this state, looked at the diagrams, did not understand how to connect, what and where.
There are 4 wires coming from the call panel, 3 of them are from the camera module, and 2 wires, similar to powering the entire panel.
A total of 6 wires come out of the panel.

in the intercom there are 2 combs with 4 connectors, we managed to find that only the first one is used:
1 - audio
2 - minus
3 - plus
4 - video

How to connect the call panel to the intercom.
How to connect everything?

Answer 1

See passport for the panel. Usually like this:
Brown - +12V
Yellow - audio
White - video
screen - ground.