I noticed something else while writing my social media posts, that I had not even really thought of while on location.
The 2 green spots, and kind of the first white spot are between the ticket gate and the turnaround point.
So if all the spaces are occupied and you'd like to wait your turn, it's a mess.
If you see someone coming back to their car before taking your ticket at the gate, the best would be to wait behind the gate until they leave, otherwise there might be no space to wait while the other car backs up. If you enter and then stop immediately after the gate, you'll probably annoy whoever is behind you anyway, perhaps even get them stuck under the gate.
If you are already past the gate and see one of the space will be freed up, the best solution might almost be to do a lap, leave the parking and immediately re-enter. But I don't know how long you have to leave the parking before having to pay.
If you don't want to leave the parking or would have to pay for an unused hour, then you will have to do the lap, then drive BACKWARDS up to the entrance gate, hope that nobody tries to enter the parking at the same time, and then you can park forward in one of the vacated green spaces.
Those parking spaces would be stupid, electric or not, but since someone might be WAITING for those spots, it would have been useful to be somewhere you can actually reach after a lap. Regular parking spaces here wouldn't be an issue, someone else can take that spot when entering.