The wiper motor on my brothers Avanti does not return to the park position, and I am not sure about the adjustment process the manual recommends. It says to move (rotate?) the small lever on the contact plate till they park properly. Is this the riveted plate that I can't budge in either direction? If so, what do I use to try to move it? I've tried twisting it with a pliers, prying it with a small bar, and lightly tapping it with a small hammer. I don't want to wreck anything, but I need to rotate this plate to try to get it in proper position. Any help from you more experienced folks out there?