This photo shows you the location of the solder points for the antenna. The "tip", or center of the antenna wire, is a little longer than the braided shield, and is soldered to the point marked "Tip". The shield is just soldered together onto the portion marked "Shield".

In other words, put it back in like you took it out, and make sure there's no solder connecting the tip and shield parts. It tends to burn up your chipset. :)