The Complex is a bunch of The End of the Tunnels intertwined with each other. The Elon Musks, Daves, or any other species haven't penetrated the border of The Complex. The End of the Tunnels have also blocked all visibility outside of the void tunnels themselves, but mysterious radio waves still pass through the whole complex. The radio waves might have originated from the pulsar at the center of the empty, which is sending out radio waves at a ridiculous speed and strength.
This cool-looking thing in the picture is actually only one of the void tunnels, zoomed out infinity times. There are actually tons more of these void tunnels in The complex. The complex is too big to be shown with one picture.