Once you have completed it, remove the rear wheel assembly shown in the photo.
Push a yellow rod right through your motor.
Then add white connectors, blue spacers and tan clips facing outwards, as shown in the photo.
Create a new rear wheel assembly, as shown.
Fit the wheels, so that the lugs on the tan-coloured interlocking clips fit into the small holes in each wheel.
Finally, fit the new rear wheel assembly back into your Rescue Truck model, and test it by switching on the motor.