So i purchased rear ek4 seats but as i took the old seats out and began to install the sir seats i realized that the screws for the side and middle brackets dont fit. i looked at the seats and it appears there are no screw swivels are in the holes. just a plate is there. Also on the left side of the left seat, and right side of right seat, there are these nubs that look like they're suppose to go into a hole but sure doesnt fit in the screw hole. i know this all may sound confusing but i need as much help as possible thanks!