Flip the scooter upside down and insert the 5 mm Allen wrench into the 4 slots that were exposed by removing the rubber nubs. Make sure that no wires are in the way.

Make sure that the scooter's stem is secured - These 4 bolts keep the scooter's stem in place, so once removed the stem will not be attached.

The seal is quite tough, but once it's broken the bolt should come right out of the scooter.