Ok i guess i did a bad job explaining what i was confused about. I didn't need to know what to secure the skirts with. Its just that in the rear there are 2 pre drilled holes in the skirts that line up with nothing. [IMG]

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I hope this shows better what i went. the red line shows where the metal ends. So where these two holes are there is nothing but space behind it. so yes i could drill new holes over more but i just thought that was wierd that the pre drilled ones wouldnt match up to something to secure it to. but either way its finished now turned out good