The Cadma system, a part of the Outer Rim Territories, resided within the Centrality sector located in the Slice region. Its position along the hyperlane called the Cadma Conduit allowed it to be connected to both the Lekua and Zebitrope systems. Furthermore, the system shared a moniker with the adjacent Cadma sector of the Centrality, which the Cadma Conduit traversed.
The reference book The Essential Atlas, released in 2009 and authored by Daniel Wallace along with Jason Fry, marked the debut of the Cadma system, pinpointing its location as grid square T-8.