Visited on May 15 and did a short charge with M-CHARGE RFID. No issue.
The chargers are in P1, in the first area at the top of the entrance ramp. There are no signs, but you can't miss them.
There are no gates. You need to use the parking meter which is on the ground floor in front of the Migros entrance. 1h free.
One of the charging spots was ICEd.