Exact route not known
Follow the in-game marker for those steps.
Start with “Defeat the guards”. This quest has 3 required/recorded objective step(s). Follow them in order, and check each step for Day/Night, timer, ability and choice requirements before you move on.
Ambrus's Cellars: Seeing Red is a quest.
Quest Reference
The in-game objectives in order, plus the characters, items and locations they involve.
Search this section for the exact wording from your journal, then use the action, requirement and location notes to work out what to do next.
Branch and optional objectives may appear in a different order.
Where a step says “Marker only”, the journal does not give a fixed entrance, so follow the in-game marker for it.
A related objective target opens the objective area; it may not be the exact entrance or the NPC’s current position.
Action
Defeat the guards.
If stuck
Action
Investigate the cellar.
If stuck
Action
Destroy the blood stock.
If stuck
Follow the in-game marker for those steps.