James,

I am not seeing the A: drive in My Computer.

I am not sure where else it should show up.

Have you already checked for the B: drive ?

The only thing I can think is that maybe that cable is defective???

Nope. That cable is designed to support *two* floppy drives, with one
before the twist, and the other after (as regarded from the connector thats
connected to the motherboard).

In short: Move your drive from before the twist to after (or vise verse),
and you most likely will see your A: drive appear. :-)

Hope that helps.

Regards,
Rudy Wieser

P.s.
Googeling for "floppy cable with twist", or even "drive cable with twist"
shows an explanation as the first hit ...