You might want to re-post and ask for a schematic, otherwise, two wires from the motor go to the heater circuit. These wires are shown going to a single switch in the motor switch housing. This switch must be open when the motor is not running, and closed when you activate the centrifical switch.
Two other wires go to the timer and common power. These go to the motor switch that feeds power to the start winding at startup, and transfers power to the run winding.
Hope this makes sense, just make sure the heater switch wiring is separated from others as the 240 volts will burn out windings!