How can I tell which line is my AC pipe under the body of the van? on 1995 Mercury Villager

I had a tires plus guy tell me that I have a leak under my van at the u joint where my second ac unit is but I can't find a picture telling me actually where the ac line is! I need help finding a picture of what all those pipes and lines are under my van are. Thanks

Asked by for the 1995 Mercury Villager