Using a wire stripper, cut the end of the wire. Get as close to the connector as possible.

Put the cut wires into the wire stripper and squeeze to remove the last 3-4mm of the insulating jacket. Done correctly you can strip all three in one movement.

Turn the stripper over and tap it on a hard surface to knock the jacket pieces out of the stripping mechanism.

Your stripped wires should look like this.

Repeat this step for the second wire.

Only strip one end of each wire!