I have 3 Tandy external disk drives. I believe I could use these with my Tandy HX computer (one 3.5" and two 5.25"). I got these in a lot of other stuff and the cables were not included. They have a small plug next to the card edge where you would attach the cable. How did these hook up to the computer? Did they have an external power source or get power from the computer? Can I get the cables anywhere?