With these connectors, you can easily make a solder-less connection to our RGB flexible LED strips after you have cut them. While soldering makes a better more permanent connection, these splice connectors are easy to use and are removable. Simply align the: Black wire with the (+) on strip Green wire with the (G) on strip Red wire with the (R) on strip Blue wire with the (B) on strip If they don't match, just turn the strip around or ignore the wire colors and go by the colors on the strips.