Is my purchased cable wired wrong?

[admin]

The Sony MFP902-1 works fine.  It has a "double notch" so the plug will technically fit either direction.  The "key" is on pin 3, but most motherboards and controllers will have the key on pin 5.  Both of these pins are ground, and because there are numerous other grounds not having these pins connected does not matter for the operation of the drive.  In the case of this disk drive, pin 1 should be towards the center of the drive (nearest the stepper motor and the missing key pin).