I have a 2001 Honda Prelude.. I had to order a new driver side wiper arm because the old one got stripped out where it attaches to the car. There are small ridges on the bolt and the wiper arm but the new arm that I got doesn't have these ridges and it doesn't fit on the bolt. I'm wondering if it needs to be installed by a machine and that is what makes the ridges in the wiper arm or if I need a different arm with ridges already in it. Anybody have any clue what I'm talking about?