Ford 2003 Mustang Workshop Manual page 1565

40. As a post-check, make sure that the copper (marked) chain links are lined up with the dots on
the crankshaft sprockets and the camshaft sprockets.
41. Remove the special tool.
42. NOTE: Make sure the base circle of the camshaft is facing the roller follower being installed.
Using the special tool, install the 32 roller followers.
43. Position the crankshaft sensor ring on the crankshaft.