Stopped by again this afternoon and took some more photos. It was open with the same person working as several weeks ago when I first went there with my wife. He even wanted to come out to say hello to my wife and see the car, which was parked just outside on the street.
More progress. Looks like the only thing left is painting the lines, installing the bumpers, and setting up a way for Tesla drivers to open the Garage Door located on "A" street. This opens on the lower level, so we enter there, then drive through to the chargers, then continue up the ramp to the exit on "6th" street. The one thing they need to do differently is the diagonal parking is currently designed to drive into the slot, but the Tesla requires the lines to be painted at the opposite angle to allow us to drive past the spot and back into it, with the front of the car pointed up hill towards the exit ramp.
It is now my opinion that Tesla is renting these spots on a monthly basis so that those charging will not have to pay. I suspect that a key-pad will be installed on the "A" street entrance so we pull in, get out and punch in the code (supplied on our GPS screen just like the Kettleman City entrance code), drive through after the door opens, then drive up to and past an open slot, then back into the Supercharger slot you wish. Since these are Urban Superchargers all of them will provide the 72 kW so any slot will work. After charge pull forward and circle left to be able to exit on the next level onto "6th" street. Seems like ease entry and exit from any of the freeways, even with all the one-way streets.
As you can see on photo 0021 there is enough room to pull in and be completely off the street and sidewalk, get out, and use a key-pad located on the wall next to the "key box". Should be a simple process of entering the garage.