Hi John (Chris), Thanks for the note but I must be dumber than a stone because I have not found a slot near the post that holds the side frame in that will accept a screw driver. I'm looking from the top of the truck just outboard of the truck attaching screw hole. Is this slot at the bottom of the channel that supports the pivot screw at the center of the bolster just to the inside of the wiper when viewed from the top. If so, all I see is a square hole, the wiper and the pivot post from the side frame. Do I have a different truck or should I be looking from the bottom???? I just don't see it. Should I use a hammer? Please advise. Thanks! Jim S