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:

Here i found the manuel for my intercom:

And here the inside of my intercom:

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