Kil, you're wrong. You can see in the first pic that the 'gigantic square thing' slots perfectly into four sections of the tower plus the top angled section. In the third pic you can see that the tracks of the excavator lock into the other custom built sections of the tower, allowing it to lean and sit as the scoop/square thing slots into the next highest section. No magnets would be required, it would rely solely on gravity, the skill of the driver and the strength of the hydraulic arm to be able to climb the tower as shown. It wouldn't surprise me at all if it was real.