Traduciendo paso 3
Locate the positive and negative terminals of the speaker.
To attach the new speaker you must solder the new wires to the terminals on the motherboard. To do this hold the wire on the old solder, using a small amount of solder melt the solder and wires to the old connection points.
For an explanation on soldering refer to iFixit's soldering guide Cómo soldar y desoldar conexiones