Puddle on passenger side footwell

Evening all

Today I noticed there was a puddle of water in the passenger side footwell, this is a 53 plate focus 1.8 zetec, I checked door seals etc and after some checks I worked out it is water and not coolant so likely air con related as that has been on pretty solid, some internet searches said it may be a blocked air con evaporator drain, I have searched everywhere and I cannot locate the drain tube,every single article or video I find is not my engine,my engine is the one with the cylinder head sensor Hiden behind the alternator and the manifold at the front but I can't find anything on that engine,does anyone have any idea where this drain tube is please so I can check it and fix it or rule it out. Thanks.