Just setting the cups in mine weren't deep enough, so I pressed them into my bountiful padding enough to catch a nut, then just tightened up the nuts. Looking at yours I can see an issue MAY be the hole in the panel for the cup. I cut mine like an "X" almost all the way to the corners because the material was preventing the cup from going all the way in. Then I removed the padding, folded the vinyl over the back, glued it against the panel, and trimmed off the excess.