Visited yesterday without charging.
There is only 1 level of parking. The chargers are among the first spots you see when entering, you have to drive in front of them.
They are relatively far from the foot entrance, which is usually better as it limits the risk of ICEing.
There is 1h of free parking, 50ct for 2h, 2CHF for 3h. But the barriers are currently out of service, so it's free forever. The parking closes with the store.
There's also a foot exit on the parking level that leads directly outside, if you don't want/need to visit Migros. This door also has the opening hours posted on it, I assume they lock it at night.