This location is visible in roaming apps but I had forgotten to import it here.
I am unable to find any picture of the chargers.
On Chargemap there is just one picture that shows some concrete foundations and cables sticking out, presumably before chargers were installed. But that area seems to be where the slow AC chargers were installed, as visible in this September 2020 360° picture from inside the showroom https://maps.app.goo.gl/gGNN8vr4UJqRaaKo7 There are a bunch of other 360° pictures from the same time, unfortunately none outside of the showroom, but we get a good look at the parking spaces through the windows and there are no fast chargers visible.
I visited this location back in July 2020 when I took pictures of the SAK chargers and I didn't notice any Porsche charger back then, but I was not really looking for them. If they were further to the back of the Porsche area I could have missed them. But since they are not visible on the 360° pictures I assume they were not yet installed at that time.
There is this July 2023 picture https://maps.app.goo.gl/6bkiAWr4EC8ehhUm6 where I think I see the fast chargers very far to the right. On the satellite pictures from map.geo.admin.ch we see some stuff in that area but nothing definitive. No EV logo on the parking spots and the poles could also be totems or flag poles. There's a white square that's probably the battery box for the fast chargers. The satellite pictures show there's also a parking on the roof, accessible via a ramp at the back of the building, but I doubt the chargers are there.
On Chargemap there is a single comment from August 2020 that says charging is no longer possible and requires authorization. I assume this relates to the AC chargers which might have been freely accessible in the past.