Hi Georgii,
There is some documentation about Quests in the user guide that explain that there are 4 data tables that hold info about the quests and within these data tables you will see the NPC ID column that links a particular quest to a particular NPC Quest Giver e.g. someone you get a quest from, or links a quest step to an NPC Quest Subject, e.g. someone you may have to talk to or rescue from a big dragon etc.
See the data tables listed here: https://docs.google.com/document/d/1…h.1z2hduf3xv9y
Also there is a “How to” section at the end of the user guide that explains how to add more quests :
https://docs.google.com/document/d/1…h.nrhv3139ihdt
Have fun!
Best regards,
James