First strip the insulation from the tip of the wire. You only need a small amount of wire exposed...no more than 1/4". Next you will "tin" it by applying some solder to the wire and letting it melt and cover the exposed wire. Do the same for the tabs on the motor and ESC. Next you will put the wire on the tab and press the solder iron on the wire and you'll see the solder melt evenly on the tab. Hope this helps!