XIAO BLE Sense battery level and charging status

Maybe I can post this here, since I can’t seem to post a new topic from scratch.
I am trying to read the analog battery voltage on SEEED nRF52840 module using pins P0.31 with P0.14 but I am using Circuit Python, not Arduino.

I have not been able to find a document that tells me what the pin definitions for all these functions are in Python, so I cannot assign the pin. I had the same issue with the RGB LED until I found an example.

Is there documentation on the net somewhere that identifies what the pin definitions are?