Visited on May 4 without charging.
The charger is freely accessible in the small alleyway between the building.
Apart from the Mobility spot, there are 2 other parking spaces delimited by the grey pavement. One of them has the charger, but there's no information apart from the Swisscharge stickers.
There's a general ban sign on the wall next to the garage door that probably applies to both spaces. It says the spots are for bank customers.
If you are not allowed to use the charger except for the time you spend inside the bank, there's really no point installing an AC charger. I hope they tolerate people using the station while the bank is closed.