Kabrel II was the uninhabited second planet in the Kabrel system. The planet was unremarkable aside from some cormaline deposits, though not enough to have warranted mining. (DS9: "Statistical Probabilities")
See also
According to the script, the pronunciation for Kabrel was "kuh-BRELL". [1]
The name of the planet was not mentioned in the episode, and was from the Star Trek Encyclopedia (4th ed., vol. 1, p. 398).
According to Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), the Kabrel system was located in the Alpha Quadrant.