What are these holes in trunk for? 67 Barracuda

Yeah I can post some pics up when I get some time. Its all done and turned out good. Its not really the way I would have normally done it because someone else started the metal work on this car. He failed to complete the car so I picked up where he left off. So the top seam is in a weird place but it is what it is. Should be fine once the bumper goes on.