How do I clear the aircon overflow pipe? where is it

[Shanosburgess]

I did search for this before posting, I have water coming in to my passenger footwell, and lots of posts suggest clearing the aircon overflow pipe, I have looked but I cannot for the life of me figure out where it is.
If some one would be so kind as to take a pic, or give me a walkthrough guide I would be really grateful.
Hopefully the 1.4 + 1.7 have the same parts in the same place.
cheers in advance and hope you are all having a great bank holiday.