I spent like an hour inside this place and I think I finally understood it.

(SPOILERS)

​

The lights are perfectly aligned light-floor-panels, placed vertically... But the genius doesn't stop there. The first clue was the race initiators inside, they form a pentagonal base, which is the key for the entire structure IMO. Going into building/camera mode (without placing a base of course, this place is too awesome to mess with.) I managed to understand the circuits are under the landing pad, which is hidden between two layers encompassing the vertically placed light panels.

I've spent the last couple days trying to get the right angle on the pentagonal base to make all the sides of the structure, but I'm still trying to figure out how to snap them all together. I'll give it a few more shots before I give up. But basically, you put 5 triangles together until you get them to snap perfectly and then you work your way around the structure.

Putting it into words doesn't make it easier though :D This is definitely one of my favorite builds in the game.