Welcome! These forums will be deactivated by the end of this year. The conversation continues in a new morph over on Discord! Please join us there for a more active conversation and the occasional opportunity to ask developers questions directly! Go to the PS+ Discord Server.
There are basic maps in some of the 1e products. Download them (for free) and see if they meet your needs. Most of them only have the major habs listed, with smaller ones left to GMs to place as needed.
What I'm not aware of is a detailed map showing the neighborhoods of Jupiter or Saturn in EP. Both of these are filled with habs. The Jovians almost entirely controlled Jupiter's space (with the exception of Europa) but not its Greeks & Trojans. Saturn on the other hand contains a great many polities, and while the Titanian Commonwealth is the big dog of Saturn, it certainly doesn't have a monopoly there beyond its namesake moon.