SAAB exterior above door little hidden flap? help if you own a saab!!?

hi, i just noticed on my 2003 saab 9-3 that on the black strip that runs on both sides of the car directly above all 4 doors is 4 small hidden flaps. they have a little slit in them so you can lift it up with your nail. its on hinges and opens and closes easily. on the inside of the flap is a peice of foam that when closed covers a small raised metal hole. i was wondering if anybody knew what this was for.. and if you own a saab 9-3 (maybe its even on the 9-5 too?) check it out.. and if you know what it is plz tell me!