Explanation of an electric motor schematic
This looks like a motor that might be used for windshield wipers amongst other things. There is a nice explanation of windshield wiper motor switching here which clarifies the wiring.

The black boxes on the left are simply inductors (Chokes, "Throttles"). I assume the small line indicates core type possibly. They are likely added to reduce the noise the brushes would otherwise inflict on the system. They act to smooth the current and eliminate the sudden drops in current as the brushes ride over the gaps between contacts.

The white circle and line exiting the motor to the right indicates mechanical action by the motor and will toggle the switch at some point in its rotation.

Finally, the black mess to the right can be understood like a sweeping contact. The central white "shaft" is an actuator connected to the left vertical bar "sweeper". As the actuator is moved, it makes contact between the various pins. Shown below are images of the various switch positions showing current flow.

Stopped Switch Position:



Slow Switch Position:



Fast Switch Position:



Stopped Switch Position with the motor running back to rest position:



Note: I don't believe the controlling switch is included with the motor, only an example to illustrate the dual speed control.