I did wrote earlier : "My source is telling me that the trains have arrived 2 weeks ago" . We did agree that we seeing eachother very soon, then i'm allowed to see the images on his phone. I can't have them.
Given the maintenance/storage bays are underground with the hotel buildings on top I wouldn't expect to see anything of the trains until the park releases some pictures or when it starts testing.
Trains could have been already on site for months or are still not there yet. Its impossible to be certain.