Visited yesterday without charging.
There are 2 Juice chargers with attached cables on a pole among the customer parking spots.
The spot on the left has a small sign "Bancomat max. 10min" and on a second line an EV sign with text "e-Mobility". The other parking spots to the right don't seem to have any sign.
The charger has QR codes for ad-hoc charging.
There is no indication on whether this is reserved for customers or available for everyone. Nothing on the signs or stickers, or in the eCarUp app. Because there's 1CHF/h in addition to the electricity price on eCarUp, I would assume it's open to the public.
The pole is in the middle of the first parking spot, so if you want to plug in a second car you will have to reach a bit further away. I didn't check the length of the cable, it might be tricky depending where your charging port is. The second connector also has its older on the back of the pole, reaching is isn't as easy as the one in front.