Finally figured out the Cosmographer add-on a bit for subsectors. Still not great but making progress.
I have no idea what the dashed lines are from that map - 30 some years have not helped to remember things. There are 2 trade routes listed. I'll have to write up that trade company - I have a couple of typewritten pages, several hand-drawn images, and oddly 1 few organizational charts. Antares Shipping was approaching mega-corporation size apparently.