Location of mistery hose
 

Hi all. So I removed the double din radio installed by previuos owner and found a mistery hose just hanging back there. I googled for diagrams but can't figure out where it goes to, any help will be greatly appreciated

https://cimg7.ibsrv.net/gimg/mitsubi...802824e21d.jpg
https://cimg8.ibsrv.net/gimg/mitsubi...981cafc21c.jpg
https://cimg9.ibsrv.net/gimg/mitsubi...2e1b3689ea.jpg

Seems to be this one but cant tell where it goes to

https://cimg0.ibsrv.net/gimg/mitsubi...eb6287e64a.jpg

found it
https://cimg1.ibsrv.net/gimg/mitsubi...942d985c6b.jpg
https://cimg2.ibsrv.net/gimg/mitsubi...0a758ee857.jpg