Ford 2003 Mustang Workshop Manual page 2055

6. Remove the starter motor.
Installation
1. Position the starter motor to the engine.
2. NOTE: To ease installation, first install the two lower bolts finger tight, then install the upper,
concealed bolt. Tighten all three bolts to specification.
Install the three starter motor bolts.
3. Connect the starter motor solenoid and starter motor cable connections.
4. Install the red starter solenoid safety cap.
5. Lower the vehicle.
6. Connect the battery ground cable.