Where to recharge A/C
 

Hey all,
Just trying to figure out the right valve to recharge my A/C unit on my 2003 Hummer H2.

http://i639.photobucket.com/albums/u...2/IMG_0168.jpg

I know it is one of these two (black capped shreader valves), but which one?
By the looks, it seems like it shouldnt matter but I want to make sure before I waste 50 bucks in freon.

Thanks

I actually figured it out.
Thank you though