Connect external Raspberrymatic (Homematic / CCU3) running on a separate RaspPi

Hi,
I have a running Home Assistant instance on a virtual server - running fine.
Now I want to interconnect to my HomeMatic - devices. For that I have a separate running instance of Raspberrymatic - I want to connect to that.

If I use the Homematic Add-On in Home Assistant, a separate Docker Instance of the HomeMatic gets created. Vice Versa if Raspberrymatic Add-On is installed, a separate Docker Instance of RaspBerryMatic gets created…
All I want is to interconnect my existing, running instance of RaspberryMatic - is there any way to achieve that?

Thanks for your support
lumihei

No ideas yet?