"place them where you want", they said. But if you want a consistent world, not every placement will make equal sense. Find thoughts and inspiration on where (and why) to put the Raven's purge sites.
Beware:
Spoilers ahead
Although your GM might have an entirely different view on the world. You have been warned, though.
Stoneloom mines
Zygofer's daughter and wife, Martea and Marga are here. They can potentially be of decisive help when defeating Zytera while at the same time are quite dangerous. The book talks about some form of protection or disguise in order to not be eaten right away. I removed that in my campaign.We do know that Marga and Martea wanted to flee to wailer's hold but were diverted. They ended up with other Marcomannian dwarfs, so Stoneloom should still be near Wailer's hold. I'd place it in Y36 / X37