Apply heat to the solder junction of the red wire with a solder iron.

Once the solder melts, the wire can be disconnected from the circuit board. To do so, use tweezers to apply a gentle tension to the wire when the solder appears fluid.

During reassembly, the reversal of this step is slightly different. First, apply heat with the iron, then place the wire on the solder pin. Once the solder flows over the wire, pull the iron away and wait for the solder to solidify.