Kelvas V

From Memory Alpha, the free Star Trek reference

Kelvas V is the fifth planet in the Kelvas system, in the Cardassian Union. It is the location of a major repair facility, where in 2375 Breen energy dampening weapons were being installed aboard Jem'Hadar warships. Odo had a number of contacts on Kelvas V, which allowed a small team of the Cardassian Liberation Front to infiltrate the planet and steal one of the modified ships. (DS9: "Tacking Into the Wind")

Kelvas V may or may not be the same planet as Kelvas Prime.