Go to google and select images - enter motor start capacitor - you will see what they can look like - wires will run to the motor from them - often clamped or bolted to the machine's chassis - before disconnecting make a note or take a picture of the wiring - makes fiting the new cap so much easier - sometimes the capacitor can has more than one capacitor inside it. Might help to mark up the wires with little sticky lables too.
Good luck...
Peccavi, July 2010