I've uploaded the images, instead of linking to them, so hopefully they'll be persistently visible this time.
The interesting thing here is that if you refer to
@scottrobertson pictures the stalls and plinths are on the opposite side to where they're now located.
https://teslamotorsclub.com/tmc/attachments/20201101_144516-jpg.604515/
https://teslamotorsclub.com/tmc/attachments/20201101_144456-jpg.604516/
So it looks like they've changed the positioning of them. I can speculate that in their original orientation, they'd be accessed from the truck parking area, whereas now they're accessed from the service road. Access from the service road does seem more sensible, as well as keeping your car cleaner, not having to drive through muddle puddles.
The fenced off area had 6 stalls, and was covered with fresh tarmac. I'd parked in the positions 7 & 8 would be in if they were to be added, and this area wasn't included in the tarmac (there was a muddy puddle as I opened my van door I had to hop over). I didn't notice any concrete plinths for an additional 2. Whilst I could have missed them, I'm fairly certain they weren't there, as I would have driven over them, and in any event the tarmac only went as far as the temporary fencing, which ends after the 6th stall, visible in an additional picture I've uploaded.