Hey guys, quick question here. My cars an 89 Bonneville SE with ~210 000 km'* and I got it off my grandparents who bought it new back in the day, what Im wondering is whats the small button on the 'inside' of the end of the windshield wiper lever do? Another thing I was wondering about is the little switch at the end of the lever as well, I havent figured out what it does.

What are these two things for?!

The switch is the on/off/resume for the cruise control. The button in the end is the set button.