Click on the hut, in the left panel of the editor, find the Quest line, and expand it. Set the parameters:
-Name (script name)
-CaptionFileRef (quest name; for this, click on the text field, press the new button, enter the file name with the name, and type the name in the text field)
-DescriptionFileRef (same as above, but for the quest description)
-Kind (quest type)
-Parameters (required for some quest types)
-Award (reward)