Visited today without charging.
This time, UG2 was open, so I went to take a look. The chargers are against the north wall, like on UG1, and are visible from the bottom of the ramp. There's also a sign on the ceiling at the exit of the ramp saying to go straight for charging.
There are no EV signs on the ground here, but there are the same EV sign against the wall in front of the 4 parking spaces like in UG1.
There were very few cars parked at this level compared to UG1.
From left to right, the chargers are:
5 CH*ONE*E8D0087*001
6 CH*ONE*E8D0088*001
7 CH*ONE*E8D0089*001
8 CH*ONE*E8D0090*001
I didn't visit UG1 this time, apart from the glance I got before going down the ramp to UG2.