Start the expedition.
Get to the Waking Titan milestone.
During this milestone, go through the portal to planet Leseycit.
After stepping through the portal on the Waking Titan milestone, instead of going to the marked location, go to -39.59, -53.41 on planet Leseycit.
At that location, go into the left-hand shelter and interact with the yellow wall device that usually holds nanites.