Is it possible to connect my Elcom BHT-100 with the Opener?

I would like to buy a Nuki opener but i am not sure if i can connect it to my intercom. My intercom “Elcom BHT-100” is not listet as supported but i found this Guide to connect unknown systems: https://nuki.io/wp-content/uploads/2023/04/howtoguide_opener_EN_2023.pdf

Here i found the manuel for my intercom: https://image.isu.pub/110703102342-b50c854795054c7cb3d40a05451b2b44/jpg/page_39.jpg

And here the inside of my intercom:

Maybe it is possible although it is not listed as supported?