a bracket is already attached
   there is space to extend the shaft. this is not set up.
   there are also two small dc motors in the box.
   the bracket can mount the body of the motor, and affix a plane normal
   to the motor shaft if 4 hours are drilled in the plane
   so a right-angle bracket might work but would put a lot of stress on
   the motor.
   the motor could use a power adapter: it has two thin bare wires.
   i'd like to find the model of the motor to get shaft measurements.