I have successufully connected Analog Urmet CS1131-004D with Nuki Opener
Do not disconnect cable just connect black and purple cable to 1 from nuki opener and connect blue and yellow cable to 2.
Don’t connect any other cable
In Nuki app select URMET 1133/20, ring cable connected : yes
And all is working
Hope this topic will can help someone and CS1131-004 will be added in Nuki’s database with theses information.