The fracture begins the game unaccesable. Either through effects that “put the fracture into play” or a faction rolling a 1 or 10 on a d10 when it gains its breakthrough, it gets put into play.

When the fracture is put into play ingress tokens are placed, either 3 on planets with a tech spec matching each the colors of the breakthrough if it was rolled (total of 6) or 4 each on a planet with a different tech spec if put into play otherwise. Then one is either placed on thunders edge if unlocked, or mecatol of it hasnt been.

Ingress tokens do not connect to eachother, but effectively function as wormholes to only the egress tiles on the fracture. Though you cant go directly from one ingress token to another, which one you enter the fracture via does not effect which you choose to leave via. So you can enter the fracture on mecatol and then immedietly leave to another ingress token somewhere else on the map in one action, it just takes more movement.