The Jove are thought to have found the ancient Talocan wormhole control network and gained access to the wormhole cluster Anoikis via it. The Jovian wormhole settlers are believed to be the forefathers of the Sleeper civilization. And many experts (including authorities in the field such as Uriel Anteovnuecci) theorize that the Drifters are, in turn, offshoots from the Sleepers. This is a reasonable assumption, given that they live in Anoikis. In addition, technology such as the thermo-electric convertors that the Drifters use to power their structures clearly bear the hallmark of the Sleepers.
The main "suspect" for me is the Takmahl labyrinth. There is a link from the Talocan not only to the Drifters but in parallel also to the Takmahl. The Drifters chose wormholes which have certain rock formations that are of particular ritual importance to the Talocan. Those are very much different from the asteroids found in belts in common Anoikis systems. Also the Takmahl incorporated most unusual rock formations in their cult.
The Talocan must have liked labyrinths too, and both Drifter and Takmahl cultures indebted to them have inherited this peculiar penchant for mazes. Although they are very different in nature, spacetime engineered labyrinths have been found in both Drifter and Takmahl home systems.
This makes me wonder whether the current changes in our spacetime allegedly due to Nexus tinkering may have induced changes in the Takmahl labyrinth too. I am planning to revisit it, but will need to enlist the help of SFRIM pilots to keep the Blood Raiders that infest that labyrinth at bay...