In this step, you're going to heat the solder pad and the resistor's lead so that they'll readily melt the solder wire.

Press the tip against the circuit board's solder pad and the resistor's lead for a few seconds to heat them both. Angle the tip so it has maximum contact with the pad and lead.

If you heat the circuit board continuously for more than 10 seconds, the excessive heat may damage the solder pad or resistor.

Feed the solder wire into the heated area until there's a concave pool ("mini volcano") of solder surrounding the lead.

Don't feed the solder directly onto the tip as it won't flow properly into the pad and lead, causing a weak connection.

The volcano should form within a few seconds. If the solder doesn't adhere to the pad, apply flux to the pad or increase the temperature.

Remove the solder wire first, then remove the soldering iron from the pad.

Repeat this process for the second resistor lead.