Using these piggyback spade terminals is easy. First, make sure you have a wire of 16 - 20AWG size. Strip the end of the wire. Then, insert the stripped wire into the terminal and crimp it firmly. You can use these terminals for various electrical connections in appliances. When handling, be careful not to touch the bare parts if the power is on. Store these terminals in a dry place to prevent rusting. If you notice any damage to the terminals, don't use them. For long - term use, check the connections regularly to ensure they are secure.