Visited today without charging.
The first 6 chargers, numbered 1-6 are easy to find in the outside parking lot with big EV signs and painted spots. The way it's laid out, it has to be public!
Chargers 7 and 8 are next to the building and also have EV signs painted on the floor. The electric e-transit was parked in a larger spot next to them and plugged in.
Chargers 9-14 I did not find. Based on the coordinates on eCarUp they are probably inside the workshop or maybe an underground garage.
All the chargers I found had QR codes for ad-hoc payment.