Schwinn overload tube. How to set it up?

[CRASH]

I have no idea how this thing is supposed to set up. On my Shimano stick shift bike, the overload tube is a spring inside with the cables attached at both ends. (I'm sure adjusting is a PITA, but I've yet to try). Anyway, I've got this overload tube that came with my Schwinn stick shifter, but it seems hollow inside.

Tips, instructions... explanations... greatly appreciated!

 

[deorman]

Same thing. Put a threaded cable housing stop ferrule in the larger opening. :| An unthreaded one would probably work.

 

[CRASH]

Is there a way to disassemble it to overhaul it? It is and looks old, and I want it to work good as well as look good.

 

[deorman]

No way that I know of.