Visited on May 21 without charging.
The chargers are in the public underground parking indicated "Dorfplatz". There are no gates, it's a parking meter.
The chargers are split across 2 half-levels. 20-22 are immediately visible at the entrance. The others are down the ramp, also very close to the entrance.
There is a 7th charger on parking space 96, reserved for the Sponticar car sharing. This charger also has a QR code and it seems to be possible to pay like the other chargers. You might be able to charge your personal car there while renting out the other car.
There are already 5 additional pre-installed stations to reach a future total of 12 stations.