This is a Zetec-Only Under-hood aesthetic hack,
but it really adds to the fit-and-finish appearance.
Minimalistic Socket set. (9MM Socket I believe is all you need)
Pop The Hood and prop it open
Remove the two small bolts in between the cam covers on the top of
Place the spark plug cover in the groove between the cam covers.
Line up the notches properly with the indentations for the bolts.
Re-Install the bolts through the holes in the Spark Plug Wire Cover.
Drop the hood!