Flat cable is not the same as thin cable. A lot of the cables that are flat are also thin. I bought this assuming they all are thin and learned the hard way they aren't. You just can't make this work on 30AWG wire. Not only the wires are floating randomly inside the plug. I stuck the individual wires on a transparent tape, aligned the perfect and then clipped them. Not a single pair worked - somehow the contacts go next to the wire and avoid contact. There are plugs that are designed for thin cables. Those are hard to find and definitely not these ones.