Visited tonight and did a short charge.
I don't remember if the opening hours were indicated on Swisscharge before, but now it indicates 24h and it's indeed the case.
You can enter the parking from either Weissensteinstrasse or Bielstrasse. Entering from Bielstrasse like for the gas station is the quickest way in, the chargers are immediately next to the entrance.
The parking is indicated as being paid, all day every day. It's 50ct for 1h30 and it's also the maximum allowed parking duration. I didn't see any parking meter close to the charging station, the closest one was closer to the Jumbo building. There is no special sign for the charging station, I'll ask Energie360 if charging customers are expected to pay. The stations have a different paint on the floor, but are still inside the area marked with parking meter signs.
The chargers have contactless readers, the first I see on HYC_50 units by Energie360. They are covered by a coming soon sticker.
The presence of the Coop Pronto right next to the chargers is much more useful than Jumbo for people who are only there to charge. This makes the offering much better than Shell down the road with their single 50kW charger.