Sheva II was the second planet of its star system. This system was in Cardassian territory.

The site of a Jem'Hadar breeding facility, Sheva II was one of the targets of General Martok's "cavalry raid" in 2375. (DS9: "Once More Unto the Breach")

This planet was only mentioned in dialogue.
According to the script, the pronunciation for Sheva was "SHE-vuh". [1]
According to Star Trek: Star Charts (p. 47) and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), the Sheva system was located in the Alpha Quadrant. The primary was a M-class star.