Never mind, I found the answer on my question above in another thread.
I would rather have changed the "inside" (cells and BMS) if the Yamaha/Bosch are that proprietary (and as I understood from the other trhead Pwnlord187 have only the Haibike Sduro frame left now) :)
This leads me to...
I have the same bike (Haibike Sduro - my2016).
Would like to use another controller like Grinfineon or Phaserunner.
My question is:
What do you mean with "bypass the discharge port on the bms"?
If I remember correctly when I had a problem with the display and removed the motor/battery for...
What you can do depends on the firmware installed. Both in the controller and in the display.
Bafang is not helpful at all I'm afraid.
I have BESST (tool) that may be used to update firmware and alter settings (UART) for the display (not the controller).
I have also been using BafangConfigTool...