Matt (aka: FenderBender) just replaced these on his car. He'll probably chime in soon. I desperately need to replace mine, too.
Thanks!Rain from the hurricane has let up...let me run out and look at mine....brb.
OK< I can't recall the last time mine were opened, if ever. The piece you are wondering about has completely deteriorated on my car, but it LOOKS like it was tucked under.