Here is a pic of how my motor is set up, I hope it clears up any confusion you have.
As you can see, the motor is mounted to the pole with the stem of the motor pointing to the ground. You then bring the dish up from the bottom (with the bracket you have taken off re-attached to the dish) and tighten it on to the stem of the motor. It is the small end of the bracket (your picture #2) that gets connected to the stem of the motor.