Visited on September 20 without charging.
This location has a picture on eCarUp, but it's super close up. There's a nice sign to say the charger is public, max 12h. There are no charging instructions, but the pico has the built-in QR code.
The parking space is directly onto Untere Ringstrasse. There are no lines to show the parking, but I think each space has a text on the wall in front of it, so you can estimate where you need to be. Touch between the "C'est tout" and EV sign you could probably squeeze 3 cars total if you wanted.
What's really strange is that the eCarUp price is set in EUR. This could cause extra fees on some swiss credit/debit cards.