How can add new connection lines in the galaxy map?

[TechSY730]

What file defines what connections between sectors in the galaxy map are drawn?

I am NOT asking how to add new warp-gates/trans-orbital accelerators themselves; I know how to do that. I am asking about how to add new lines between sectors on the galaxy map.

I have a mod that adds new trans-orbital accelerators to Terran space (something in the the Terran Revitalization Project, I don't remember which one though) and while they are fully functional by both me and NPCs, they don't show up as connections in the sector map, which is slightly annoying.

But this question isn't really specific to the TRP; I'd like to know the answer in general.

[X2-Illuminatus]

The sector grid and its connections are defined in the 00749.bod. Dimosus released a tool to create this file based on your universe map.