There are 4 clamps on each corner on the top of the pedestals. You unscrew the locking screw on the clamps and open them ups. Place the machine on top so the four legs of each machine are in between the two half of the clamp. Once the machine is properly aligned in the clamps, close the clamps around the legs and screw them back together to hold them. Make sure you level the pedestals in their final position on the floor before mounting the machine as they become quite heavy and leveling will be difficult once they are attached.