I suspect your hard drive is the one shown on the right:
The "black plastic part" is an adapter for the flexible ribbon cable.
Hi,
Thanks for the great pictures. They sort of clarify my question although if I were to prise apart the black plastic part on the SATA drive,(as I did on the one I just took out and in the process damaged a few of the pins), it would look quite similar to the IDE drive show on your pictures.
But thanks for the clarification and btw, great pictures that shows clearly what I wa asking.
Thanks for the clarification to my quesiton.