The screws that came with my tower won't cut it. I need something to go all the way through. I got 3/16 x 3" bolts. They worked out perfectly. In fact, I didn't see a need to place nuts on the inside. The tower is quite secure without them. For the hole where the wire is, take one of the bolts and cut it down to about a half of an inch and screw it in. The bolt will catch on the metal and secure fine. Plus, the screw heads match.