What are these holes in trunk for? 67 Barracuda

Im working on a 67 barracuda for a friend and have some questions about holes in the trunk. They are obviously factory but I dont know what they are for. Was there seam sealer in these holes?

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I don't think mine has those holes. I'll have to check again. But now that I think about it, my trunk pan may have been replaced before I got the project.