This is a cable kit for the RevoltOSD flight controller and the MillivoltOSD V2. The MillivoltOSD V2 has a 4 pin connector for the camera and matches the RevoltOSD cable.
The MillivoltOSD v1 has a 3 pin connector for the camera and is purchasable here.
Please be aware that you may have to swap some wires around to accommodate the varying connector layouts with different 4in1 esc's. Do your research and make sure you are connecting the wires correctly to your components or bad things can happen!