Hello,
before it was wired like that: (a combination of your suggestion for purple cable to block 9 and blue cable to block 10 and the other cables like the Nuki app suggested):
Purple: 9
Blue: 10
Red: 1
Black: 9 (cause Nuki documentation uses purple and black for same port)
Green: CA
Orange: 2
Everything is working, but when I press the opener on the intercom, or open via Nuki App, the intercom is ringing for the same duration as opening.
So then I tried your suggestion with only 3 cables:
Purple: 9
Blue: 10
Green: CA
But unfortunately the same problem. The intercom is ringing, when I am opening. Do you know how to fix this? Thanks for all your help @Rose_Languste !!