Connect your SMD 5050 RGB LED strip light to another LED strip, LED dimmer or LED controller. No need to solder. Installation Instructions: 1. Make sure your LED strip is 10mm wide and has 4 copper contacts (+, B, R and G) at every cutting line. 2. Carefully cut along the cutting line on your LED strip and cut your LED strip into 2pcs, and make sure the copper contacts on the 2 LED strips are the same in size. (not a bigger area of copper contacts on one LED strip, and a smaller area of copper contacts on the other LED strip.) 3.Open the white clasp of the connector. 4. If you use a non-waterproof LED strip, please insert the LED strip into the connector. Make sure the 4 copper contacts on the LED strip are under the 4 electrical conductors in the connector. Make sure to match the + side of the LED strip to the + side of the connector; If you use a waterproof LED strip, please first remove the silicon around the cutting line, then insert the LED strip into the connector. Make sure the 4 copper contacts on the LED strip are under the 4 electrical conductors in the connector. Make sure to match the + side of the LED strip to the + side of the connector. 5. Close the cap. Package content: 10x connector cable for SMD 5050 RGB LED strip 10x male to male 4-pin plug for RGB LED strip