Nuki Opener - Urmet 1702

Hi, I have bought a Nuki Opener and I am struggling to get it to work with my intercom. I have an Urmet 1702 intercom. The instructions in the app don’t have the same connections to what I have. Is anybody able to advise please?

I think my intercom connections are:

RD-Parellel monitor power
R2-Video power positive
R1-Video power negative
CV-Data line/Video signal enabling terminal?
CA-Door lock & release
FB-Speech in
FA-Speech out
0V-Ground (not used)