Ford 2003 Mustang Workshop Manual page 1633

2. Connect the fuel charging wiring harness to the rear of the lower intake manifold and install the
manifold.
3. Install the intake manifold fasteners and tighten in the sequence shown.
4. Position the fuel charging wiring harness and connect it to the fuel injection supply manifold in
three places.
5. Connect the eight fuel injector electrical connectors.