MPI Connection (node-red-contrib-s7comm)

I am using node-red-contrib-s7comm flow to get communication to Simatic S7-400 without any problem by using ethernet.

I wonder how to get connection using MPI Communication since some PLC doesn't have Ethernet connection. I am using USB-MPI PC Adapter, I also has USB A2 PC Adapter.

Please advice
regards
bin mulyadin

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I'm trying the same thing, hope the endpint will go through the USB connections, and find the right one connected to MPI port on PLC.
What is "USB A2", what does "Adapter 0 PLC 2", the default settings mean?