Mystery Vacuum Line

Well found this vacuum line just sitting next to the passenger side strut tower but nothing is going to it. Here is a pic as I am sure some of you guys will know where it goes.

Note: do not pay attention to the yellow wires. Those are getting pulled.

I don't know for sure, but I would guess it plugs into the the circle black thing on the firewall. It looks like it would fit there.

EDIT: I just checked my pictures and the vacuum line does plug into that spot on the firewall.

That is where I figured it went but wasn't 100% sure.

Any ideas on what this vacuum line is for? When the car is running I feel no vacuum from that hose.

Thanks!

Just out of curiosity, does your windshield washer work? I didn’t go out and look but if I remember correctly that is what that hose is for, it comes from the washer pump. I do know there should be another piece of hose coming out of that grommet that that hose connects to. Might be something to check?

Yep, looks like the winshield washer fluid hook-up to me.