It depends what the layout of the RGB LEDs are. If they are common anode (such as the RGB LEDs
on our website), then they can be used with the 1031. However if they are common cathode, then they will not be controllable with the 1031.
To use the cables provided, you can cut the cables in half, strip the ends of the wires and then solder the tips of the wire to the appropriate pin on the RGB LED. This would require two ends of the cables, since each cable has two wires for cathodes and two for anodes, and the RGB LED has 3 cathodes and one anode.