My fork has a hole in the end which the clutch slave rod goes through. There is a nut on either side of this hole. On the slave side it is a BIG nut ground smooth to a taper on the side that fits into the fork. If I recall I think it was a small nut welded to something like a wheel 'lug nut'... The other side has two nuts locked together and becomes the 'lock nut' to hold the adjustment.
Something like that, I can't recall exactly, but it works really well!
