New Parts needed for this step:
Slide the motor fully forward.
The motor doesn't have to be fully forward. Don't put too much stress trying to get it all the way. Close is good enough.
Insert the platform legs into the small sockets at the bottom rear of the base. Align the legs as shown.
If you put the legs in the wrong position, be careful to pull them directly backwards so as not to break one.
Slide the motor platform forward and down until it is inserted fully.
Be careful not to apply too much pressure in any one direction. Wiggle the motor platform side to side slightly to help it slide.
Squeeze the platform legs together slightly, allowing the motor platform to drop down. Press each platform leg into its socket.