Secure the circuit board with a vise or a "helping hands" tool. Angle the board such that you can easily access the solder pads. Wear safety goggles.

If possible, use a tip with the largest surface area that can still fit between the solder joint.

Turn on your soldering iron. If your soldering iron has temperature control:

Set it to 350 °C (~650 °F) if you're using leaded solder

Set it to 375 °C (~700 °F) if you're using lead-free solder