Have any of you Sti guys looked underneath the top part of your spoiler? I had noticed it's odd construction before but forgot about until I was cleaning the car real good today.

Here's a pic:
http://home.tampabay.rr.com/bikeboy/images/Sti rear spoiler tr.jpg

It looks like it's some sort of insert into the spoiler that goes all the way across. The round circles are a rubberized covering for the holes where a fastener is. Any guesses?