Theres a little tab?? Is it supposed to clip into something or am I missing something?

from what I can remember there should be a slot in the hub for the self canceller to fit into

get a file

mind though to make the slot in the right place, refer to the orginal wheel or work out the position by putting the plastic thing in the switch gear and turning it with the indicator on

[Edited on 18/2/11 by Mr Whippy]

The boss you have is for a mk3~4 escort and not a sierra.

just cut a notch out with a file as said.