There's (to my knowledge at least) no actual indication of exactly which system the wormhole will be located. Its always in a hidden mass sector in close proximity to the barrier.
When I get to that stage in the game I usually field a small scouting ship with a powerful/fast charging hyperdrive and use that to spam check around the barrier to locate the system.

Its very distinct when you find the right system so theres really no mistaking it.

Thank you for your help and the good text!

There are several, they can each be found near the barrier.

引用自 Warrax：

There are several, they can each be found near the barrier.

Oh, kinda makes sense, the sectors are ramdomly generated. Thank you to let me know that