These 4-wire flexible solderless connectors eliminate the need for soldering when installing color-changing LED strip lighting. The slim, low profile design allows them to be used in tight spaces where common connectors won't fit Gently lift the black plastic clip (but do not remove it entirely), insert the PCB so the 4 conductor pads make contact with the connector pins, then replace the black plastic clip to lock the connector in place. Now the strip is terminated with wires. Connect it to a power source or extend power to the another strip, the options are limitless now that you have familiar wires to work with Fits 10mm 4-conductor PCB strips