I think i know what your talking about....
I drilled/cut off shaft, and put in a nut/bolt (with it shaped into a ball) where aussie cable goes.
Hard to explain. I might be going on cruise, so if your going you can check it out as its still fitted to my car.
When i put on my 70mm next week, ill probly re-use the dodgey i've done, but you could make something similar yourself.
Im not even sure you would know what the hell im on about. I dont really know myself!