I have taken the hard drive from an old TV topbox, I intend to use it as an external back up for my PC. Assuming I can re format it I am having some difficulty in getting the correct cable from hard drive to USB. The cables that came with a conversion kit are ok for the mains connection and the cable for the `USB` part is ok at the hard drive end but doesnt fit at the USB end. (see attached. Assuming I am connecting this properly what replacement cable do I need for the hard drive to USB.