Air-con re-gassing? Where under bonnet?

Hi, Where abouts do you re-fill the aircon? Is this right, there seem to be 2 of these little black caps that screw off. Is it one of these?


http://s81.photobucket.com/albums/j218/hoopster7165/?action=view&current=Air-Con.jpg

Many thanks

T

Yes. Re-fill valve will only fit one of them.

Thanks Skodaman I did hear it was pretty simple