This shield has the 1.0 standard pinout that consist in
By taking a look at the photo of the motor shield (http://arduino.cc/en/Main/ArduinoMotorShieldR3) I see that there're two input plugs in there (white color) named 'In 2" and "In 3". In the schematics these point to "A2" and "A3". I assume these are A2 and A3 of the underlying Arduino board, right? So I can use these for my own purposes (not related to the motor shield per se).