WisDM vs 12V battery status

Issue: Display battery status in WisDM

Setup: 7249 with FW: WisGateOS 1.3.5

LoRa® Server:External

Details: The WisDM promotes the possibility to monitor the 12V battery status but I am not able to find this value / state anywhere in the WisDM portal?
Got external battery connected to the 12Vdc socket on the PCB (4240).