Visited yesterday without charging.
The chargers are in the Raiffeisen parking, which is freely accessible without any gate behind the building.
The signs for the 3 parking spots to the right of the concrete building and chimney, including the 2 charging spots have "Reserviert" signs with a tow icon, which is different from the "Raiffeisen" sign in front of all the other spots in the parking. But because it doesn't mention a plate number of "Mitarbeiter" it's unclear if the sign is supposed to says reserved for public charging or reserved for the bank usage.
Charger 16 is on the left, 15 on the right.
There's a Mobility car with its own charger and parking spot.