The original clips were wire, and had a hard piece of cardboard that was placed between the clips and the molding, so you didn't damage the molding when pushing it into place. In the middle the wire it was fashioned with a spring action point that would grip in the hole drilled into the rocker. I am not impressed with the replacement plastic clips, and instead of using them, I would use only the rear one, and in the center, I would us large strips of 3M double sided tape, the kind that they use to hold moldings and metal emblems on newer cars. Even if you have to double or triple up the tape to accommodate the gap, it will be better than drilling holes in the rockers. My main concern is that the points on the new plastic clips will come loose, and you will have to find another attachment method later on. Also, the holes in the rocker can also lead to rust problems later one, and you have to make sure that they are all aligned exactly.