Canderous had, behind Revan's back, reformed the Mandalorian Clans and lead them into the battle of the Starforge. After that Revan headed to Malak's room and while they were duelling a third fleet dropped out of the hyperspace. They fought their way to the command center of the station where they found her.
When Revan arrived at the Starforge, Canderous disappeared. For all of the mod players out there seeking to appease their love of the Old Republic era, be sure to give this mod a download. It currently replaces the three standard Forces of Corruption factions with the Old Republic, the Sith Empire and the Mandalorian clans. It draws from a variety of free-release sources to bring us a nicely blended mod. Evil33 brings us a well compiled Knights of the Old Republic era mod aptly named KotOR Mod.