Just a quick one….
This little device is used to cancel the indicators. It normally has a little tab which inserts into a little hole at the back of the steering wheel to give it a positive drive. Mine was bent over and broke when I tried to straighten it up.
I solved the problem by soldering a small piece of steel wire into the groove where the tab normally is and then bent it to line up with the hole in the back of the steering wheel boss.