The candle puzzle in the Abandoned Keep gave me some trouble so I made this little schematic to help myself out. Uploading in case someone's stuck here : r/Pathfinder_Kingmaker
Secret Ending and Ascension Achievement guide - Pathfinder: Wrath of the Righteous - Neoseeker
Pathfinder: Kingmaker - Hard Mode - Abandoned Keep Secret room - Candles puzzle - werglia na Twitch
The Hollowing of the Dyrwood - Act II - Pillars of Eternity: Complete Edition Walkthrough & Guide - GameFAQs