"Catcatching in Almas Thirr" quest offers an option to lure the slaver to Majordomo's Sanctum, where he gets arrested by a unique Ordinator. With the Sanctum refit merged, the room where he gets caught is restricted and has a 60 lock. The related PositionCell coordinates and the position of the quest-related Ordinator should be adjusted to make it happen upstairs instead.