Just looking at it, it's hard to tell. Do me a favor. First, start the engine and place your finger over the end of the connector to determine if there is vacuum present.
Next, at idle, have you noticed any vibrations or a rough idle?
I attached a pic below showing the vacuum hoses I suspect it could be related to. I highlighted them. If possible, take a pic further away from the engine so I can see more. Also, see if you can follow that hose to determine where the opposite end is.
Let me know.
Sunday, November 21st, 2021 AT 7:56 PM