I am putting the car back together and I noticed that the grommet that surrounds the wiring harness, just to the right of the brake booster extension was out. So I tried to fit it back into its hole. When it didn't want to go in, I looked at it more closely and it looks like there is a flat piece of metal inside the hole that keeps the inside part of the grommet from seating properly around the hole. There also seems to be a similar flat piece at the top of the hole on the inside. Each seems to be held in place by that M8 bolt seen in the photo below. How is they round grommet supposed to fit inside a hole that has been "squared" inside?