I believe you are referring to the Pop Bumper "Skirt" Nipple ,or the pointy arrow that faces towards the top of the Playfield. This is usually an option to cut off but in some Williams games you Have to do it. Just get whatever razor blade device you like and trim off round to make the "Skirt" look like it was never there. I keep them on if I can even if the game did not have them originally, but that is me.
Ken