Ford 2003 Mustang Workshop Manual page 231

All vehicles
1. NOTE: Inspect the insulators for wear or damage. Install new insulators if necessary.
Install the upper insulator on the spring.
2. Install the lower insulator on the lower arm.
3. Install the rear spring. Make sure the pigtail on the lower arm is at the rear of the vehicle and
pointing toward the left side of the vehicle.
4. Install the pivot bolt.
1. Carefully raise the lower arm into position with the special tool 014-00942.
2. Install a new pivot bolt and nut. Do not tighten at this time.