Visited yesterday without charging.
2 spots reserved for charging in the Felseneggbahn parking.
I'm not sure what the parking conditions are. The signs say "Besucher Luftseilbahn" but there's no payment machine or any indication of what you need to do to justify your parking there. I don't see any mention of the parking on their website https://www.szu.ch/de/ueber-die-szu/felseneggbahn
On Swisscharge, the picture shows different hardware from my pictures. It's probably the oldese charger that has now been replaced with the new one I photographed.