Visited on August 31 without charging.
There are 2 green parking spaces reserved for charging in the sports center parking. There's no maximum time, just "while charging".
The parking appears to be free, the sign at the entrance says maximum 24h.
The chargers are equipped with QR codes for ad-hoc payment but without any text to tell you it's eCarUp, the eCarUp plug ID or the public EVSEID.
There are additional stickers "Ladestation 2" and "1" on the side of the units, but those number don't match with the eCarUp numbers, it's probably just locally for the electrical wiring. The QR codes are probably installed correctly, with 1 on the left and 2 on the right, because the eCarUp description includes a 4-digit number which matches with the end of the serial numbers.