Do to modern manufacturing, you will need to cover the area in solder flux; it is messy, so be careful.

Prep your desoldering braid by pulling it into a shape that will allow it to contact the solder on the baord itself.

Touch the soldering iron to the top of the contact after it has heated sufficiently; the flux will melt, as will the solder, and both should flow into the desoldering braid.