Where is the AC pipe to fill the freon on 2001 Ford Focus?

The low-side charging port is located in a really stupid place. It is on top of the AC accumulator, which is in the front passeger's fender, ahead of the passenger's front wheel. Reach up into the fender from underneath, and you will feel the accumulator. Reach way up on the top rear of the accumulator and feel around. It's there.