Using these red 600V fully insulated 6.3mm female flag spade terminals is easy. First, make sure you have the right 22 - 18 AWG wire. Strip a small part of the wire insulation. Then, insert the wire into the terminal and crimp it securely using a proper crimping tool. Remember, these terminals are designed for voltages up to 600VAC, so don't use them in higher - voltage situations. When storing them, keep them in a dry place away from moisture and direct sunlight. If you notice any damage to the insulation or the terminal itself, don't use it. This helps ensure your safety and the proper functioning of your electrical connections.