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2014 ford focus mystery hose

I just bought this car and ive fixed a few problems ready but theres a hose and i have no idea what its connected to but the other end isnt connected to anything. I can upload better pictures if needed. Just need to know if its important and needs to be connected to anything. Let me know anything! All helps

Looks like a simple vent/breather hose for something.

See if you can see what the other end is connected to.

Tester