Using these piggyback spade terminals is quite easy. First, select the appropriate wire within the 14 - 18AWG size range. Strip a small part of the wire's insulation. Then, insert the stripped end of the wire into the terminal and use a suitable crimping tool to secure it. When you need only one terminal, simply snap it off from the strip. As for maintenance, keep the terminals in a dry place to prevent rusting. Avoid excessive bending or pulling on the terminals as it may damage the connections. If you notice any signs of wear or damage, replace the terminal promptly to ensure safe and efficient operation.