Modbus RTU, Two Arduino, USB, Overriding port

I’m talking to you now the words of the famous song about you: you are simply the best… tu tutu tu
I think version 1.7-1.8 openhab have problem with bindings.
You really helped me.
I have questions about the Binding COM ports in Raspberry. I have a problem because my 9 Arduino have SerialNumber. I need to remember all the Arduino. But this question is not for this topic. Thank you хороша людина!
When I finish my project I will share with you information