Visited yesterday without charging.
The charger is in the paid parking "TCS Seegräben". It's on the north-west side, on the right just before the exit gate.
2 parking spots are reserved for charging. There's the green paint with Energie360 logo and large EV. There's an additional sign on the charger saying people who park there without charging will be fined.
I'm not sure there is a divider in the middle of the road in front of the entrance and exit, but I found the turn west out of the parking was challenging.