Mechanism's Missing Screw

Find 4 components of Tep's portal and install them to appropriate lodgements.

Tep is great! He was building it to last centuries... millennia! Isn't it marvelous that his Pyramids are still operational? Just like this portal...
But a few components are missing. Which ones exactly? If only I knew... I need to think...
However, {username}, if you manage to collect the components that seem orphaned but looking like they might fit this portal, we can try and put all of them together...
And if it proceeds to work then, it would mean we've assembled everything correctly!

Find the components, and then we'll be able to tell what to do next!

Well, the lights are blinking, there's no smoke, nothing's blown up! It means everything was done right! O great Nih, share some of your wisdom with me...