The Modus system existed within the Rifle Worlds region, a section of the Hapes Cluster, situated in the Slice region of the Inner Rim. It had a connection to the Rifle Worlds' Vergill system and the Gateworlds' Sargon system via the hyperlane called the Rynmar Trail. The system's designation, Modus, was the same as the Modan starship manufacturing firm.
The 2009 reference book, The Essential Atlas, by Daniel Wallace and [Jason Fry],(/article/jason_fry) was the first time the Modus system was mentioned, locating it in grid square O-9.