User blog comment:Jimeee/Dragonborn officially released on Xbox Live/@comment-5179958-20121208031544/@comment-5185283-20121208071256

They are for a pedestal inside of the Dwwarven training area inside the ruins of Kagrumez. It's pretty much right in the middle of the island. Each of the doors will have nine indentions just like the pedestal, but some of the indentions will be filled with a blue substance to indicate which indentions to fill on the pedestals.