Using this jumper adapter cable is super easy. First, find the component with a JST connector. Plug the female JST connector on one end of the cable into it. Then, connect the breadboard hookup pigtail on the other end to your breadboard or Arduino - based device's pins. When handling the cable, be gentle to avoid bending the pins too much, as it might damage them. Also, make sure the pins are inserted fully to ensure a good connection. To keep this cable in good shape, store it in a dry place when not in use. If it gets dirty, you can use a dry cloth to wipe it clean.