Visited on July 6 without charging.
The station is freely accessible in front of the school building.
There are no parking instructions. There are some parking spaces painted, but nothing matches with the shape of the building. Some re-modelling must have taken place at some point.
There are signs to a "school parking" from the main road, but that's not for this location. To access the chargers, you need to drive up the Schulstrasse past the forbidden sign for through-traffic. Because of that sign, I tried finding another way in, but there isn't. If you drive around the school and enter the Schulstrasse from the top, you'll see an identical sign. There's no way but driving past.