Using this cable is easy. First, connect the JST PH 3-pin end to the appropriate port. Then, use the male header plugs at the other end to connect sensors or LEDs. When handling, be gentle to avoid bending the pins. Store it in a dry place when not in use to keep it in good condition. If you use the version with female socket headers, make sure the connectors fit snugly. That's all you need to know to make the most of this cable.