Recharge A/C

Has anyone purchased a kit and recharged their A/C system? I have did this on a Neon. Can anyone describe (location) the line I need to connect the freon to? This will be for a 1996 Jetta 2.0. Thanks in advance.

Joel
Columbia, Md

I have a 97 Jetta with a 2.0 and there is a black box at the firewall on the passenger side of the engine compartment with 2 steel lines coming out of it. The box opens up and the fittings are in there.

are there 2 fittings in the black AC box w=itch one to attach cold can to for ac recharge