The problem is that with only solder holding it together it breaks with
any type of stress on the pin, if I move the speaker, the solder
breaks. I would also like to use a spade connector instead of the
banana clip connector. If I tried to use a spade connector now it would
pull the pin out.

Ultimately I think I want to splint the pieces together with a post or
headless bolt placed in a hole drilled concentrically down both pieces.

I'm willing to pay to have the post fabricated out of gold or whatever.
This is a very high end speaker.

I'll upload pics tonight.