 Let's crimp a connector. For these JST XH pins, I'm using 24 gauge wire, along with wire strippers and a pair of engineer universal crimping pliers. Strip about three millimeters of insulation from a piece of wire, and twist the conductor together to keep it from displaying. Each connector has a long set of arms to grip the wire insulation, and a shorter pair to grip the wire conductor. Place a connector in the crimper's 1.6 millimeter slot, with the longer arms still outside. Insert the wire right up to the insulation, so that we're only crimping the conductor. And squeeze firmly. Check to make sure the connector has a good grip on the wire. Now place the larger collar arms inside the crimper's 1.9 millimeter slot. Then give it a strong squeeze. Check again to make sure it's all secure, and you're good to go.