OK
There are two voltages in the diags interface on your model which are KL 30 (V-Bat) and KL 15 (Ign On) which could be monitored. I normally do any logging from a GS911 WiFi as it is easier without the PC interface and I have never been asked to look at your model so I am flying blind a bit here
I would expect you should turn on ignition, set up the logging with the PC interface, there should at least be KL15 available in the parameters to be logged, then start the bike to see the voltage changes