ᐅ Connecting a/b Patchbox Pro Gong to the Door Intercom System

Hi,
I have an intercom system with an a/b Patchbox Pro from L-Tek.
It works fine so far.
In addition to the ringing phones, I would like (or rather the authorities require) a traditional doorbell chime. The chime is a Grothe Croma 100A.
I have studied both manuals, but I cannot find a common solution.

Can you tell me how to connect the two devices?

So far, I have considered connection diagram “C” to be the most sensible.
However, when I connect it this way, the chime does nothing when I press the doorbell button. Not even an LED lights up.
To me, only C and D make sense at first. After all, the Patchbox only provides two wires to the chime (12 V, or not?).
Or do I need to supply the chime with constant voltage (12 V or 230 V)?

The doorbell is connected here. Terminal C is not related to this; it is only the power supply for the entire system and the doorbell buttons.

Yes, I have connected them there as well, using 2 wires.
And created the jumper as shown in the diagram.

But where do I connect the two wires coming from the patch box to the chime?
By "C" I mean connection diagram "C," not terminal label "C."

Maybe I should have mentioned that...
The right part of the image shows the connection diagrams of the chime.
On the left is the connection diagram of the patch box.

Connect the two green wires from the junction box according to wiring diagram B to =/~ and C1.

OK, but I don’t want to use batteries.
I thought that the patch box supplies 12V as power exactly when the doorbell needs it and triggers it at the same time.

If the doorbell requires constant power, I could simply run 12V from the doorbell transformer, right!?

Simply omit the batteries and then connect it to point D.