You need to find the Emberbrand Wine Stash for Captain Veleth for the misc quest objective:
Locate the hidden stash of Emberbrand Wine in Raven Rock
Where to find Stash of Emberbrand Wine
Go to abandoned house in Raven Rock
See maps below for help finding it. Red "X" marks the spot:
Look for a alley in between the foundations of two ruined houses. See screenshot below for a general idea on how to get there:
There is a barrel there. Here is how it looks like:
Search the Barrel and find the Emberbrand Wine:
