I took some pictures yesterday but didn't want to enter the parking.
The charger is outside at the back of the parking, barely visible on my picture. It seems to still be a GreenMotion NetworkTwo as pictured in the evpass app. The picture on evpass is probably outdated because it seems to have the received the generic evpass branding stickers which are not visible in the app.
The description in the evpass app makes mention of the 3 hours free for customers, and it seems like you can ask for it at the reception just by being a charging customer.