Yes, being able to do this in GalaxyForge really is needed, but until then...
I found the easiest way is to use Graph Paper. -click to see how I am setting up my map. I've drawn up where my stars are (numerical assignment) and jotted down the wormholes (numerical assignment), then what wormholes are linked together. (Map is mostly complete in GalaxyForge, final touch will be wormholes between stars)
Mark down where your stars are (numerically: Star0, Star1)
Write down each wormhole at each star by planet number (planet3, 8, 19, 32, etc... whatever they are)
Write a letter above each wormhole to wormhole connection (planet3 A, planet8 A, planet19 B, planet32 B )
Write somewhere off to the side the connections:
A 0:3 - 1:8
B 1:19 - 0:32
Now comes notepad.
(Borrowed From Voruk's Labyrinth source and editted)
interStarConnectionCount # (however many letters you use -the above is 2 interstarconnections)
interStarConnection
starIndexA 0
planetIndexA 3
starIndexB 1
planetIndexB 8
spawnProbability 1.000000
type "Wormhole"
interStarConnection
starIndexA 1
planetIndexA 19
starIndexB 0
planetIndexB 32
spawnProbability 1.000000
type "Wormhole"
However many "Letters" you have equals the "interStarConnectionCount #". If you have 30 wormhole to wormhole connections (not in same star), then the number would be 30. These wormholes are bi-directional in nature.
Avoid loading the map into GalaxyForge if it's eaten up all your interstarconnections before -edit via notepad, load into SINS, surrender and view the map. Good Luck.
Hope this helps, it's helping me as keeping so many connections stored in short term memory at once causes headaches -not to mention delusions of being Q.
*edit -damn smilies showed up with B and parenthesis so no more
, just B