Where do I add Freon in a 2001 Ford Focus ZX3

Ive been trying to find the valve where I can add some Freon in my Ford Focus ZX3 but not much luck. I found a valve thats right in the front of the car (under hood of course) in a very convenient location, however, the freon connector I am using wont fit the valve, so Im not sure its the right valve to begin with. The Freon connector I am using came with the can, and I used it just fine on my Dodge Intrepid earlier today.

So either the Ford Focus ZX3 Freon Valve isnt the regular size as other cars, or I wasnt looking at the right one.

All help would be greatly appreciated! Thanks in advance!