On the user-contributed pictures from July 2022 on &Charge we see the charger is a Mennekes in the outdoor parking. The parking doesn't seem to have any signage. The parking spaces are not designated any differently than the others.
The only QR code visible on the pictures seems to suggest the number ending in -17 is on the left.
We can also just about make out the charger on the swisstopo satellite images. There are no yellow lines or "Privat" markings on the ground.