Chaz 58,
Thinking at this point we need pictures to help try and figure this out with you.
The cable housing should have threaded on to a "plug" in the large diameter whole in your trans tail shaft housing, retianed by the before mentioned tab and bolt.
That metal plug the cable housing screws onto, holds the output "driven" speedometer gear (plastic) which the inner cable slides into to create a driven connection between there and your speedometer.
As I said, pictures are needed on this end to help figure out what if anything is missing in this equation.
If you need help figuring out how to post pictures, click here:
How to Post Images 
