They look like OEM toyota bolts, but they don't seem to do anything. I'm taking this thing apart and I can't remember anything being there, and there isn't anything underneath supported by these bolts. 78 US spec 40. That's a top-down pic of the drivers side rear wheel well, the four empty holes are bolt holes for the back roll bar. Any help is appreciated! I'm sure it's something obvious, but my wife says I'm not known for spotting the obvious.