You can configure the beta value here:
When you connect the NTC and configured it you can enable it by setting the “Temp sensor enable mask Battery” to 3 if you connected both sensors on the balance connector. Set it to 1 if you have only connected a sensor to NT0 and set it to 2 if you have only a sensor connected to NTC1.
You should now be able to see the value in the realtime window: