Right.
Due to crap connection, Id better let you lot know what ive figured out. Please excuse the lack of images - I can upload one, and that's it.
At the alien site: According to my personal theory.
Three extremely important things:
1: The triangular blocks might act as energy dispersal devices. A group of blocks will reflect energy amongst themselves. They can also RECIEVE energy that has been "Beamed" to them, and also disperse energy among themselves and "Power" the circuit that they are on.
2: The larger dark obelisk blocks might be energy "Channelers" they can boost and refocus energy along the long axis. They act as amplifiers in other words, sending energy through the air across distance. But, the can also "Receive" energy through the circular depressions on their sides.
3: The Crystal towers might provide radiative energy which maybe must be focused to be put to use.
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The key to this puzzle is getting the lower cog to work. As you can see in the attached picture, they are stuck in the wrong position. Red indicates where they "should" be.
But they are not. The circuit is broken. The crystal towers provide radiative energy, and in the "Correct position" the obelisks would absorb that energy. But, they are off centre, and are receiving a small amount energy at an extreme angle. Maybe this is what is powering the "server" stones...
So... How do we fix it?
A: We shoehorn it. And this is where the Artefacts come in. I believe they act like energy focusing devices. And each one has a different purpose.
EG:
The "ORB" receives energy and radiates it in all directions.
The "CASKET" acts as a missing triangular stone.
The "URN" bends the energy in a new direction.
The "TABLET" acts as a makeshift "Obelisk"
The "TOTEM" --- I havent got a clue what that's for...!
What I presume we need to do, is place two tablets on top of the lower cog in the correct positions in order to amplify the energy being received. After that... Well, after that I don't know. That's where you lot come in. We need to put our heads together and figure out what does what! - When I say for example: the "ORB" provides radial energy - im just guessing at the logical purpose. I cant actually get in game to try it out at the moment.
Please take the time to study the half (not even a third) completed diagram. I do hope I have been of some help here.
- - - Updated - - -
And... as you can see, this is very much a work in progress. Pink lines indicate where things need to be placed to make it work. Brown indicates possible underground circuitry negating the need for over the air energy. Blue is the presumed circuit.