One of the chargers is now visible on opendata and eCarUp app since May 23. The eCarUp picture includes a label designating the leftmost charger as number 1.
The description reads "22kW, Maximale Parkdauer 4h, Mo – Do / 05.00 – 18.00 Uhr Fr / 05.00 – 17.00 Uhr Sa & So geschlossen"
So it sounds like that one charger might be open to the public?