After a brain storming with friends.
The path of souls was also named the Styx.
The system Styx is actual under the Alliance influence area.
Considering that Achenar is the end of the Eridan River (which could be also being The Styx), if we line from Styx to Achenar, we found Sol at the middle of the road.
Above, we said that "At Phaethon's Read" could probably means : From Sol, and "follow the path of souls", go to Achenar.
The path of souls was also named the Styx.
The system Styx is actual under the Alliance influence area.
Considering that Achenar is the end of the Eridan River (which could be also being The Styx), if we line from Styx to Achenar, we found Sol at the middle of the road.
Above, we said that "At Phaethon's Read" could probably means : From Sol, and "follow the path of souls", go to Achenar.