Removing a 5 1/4-inch device bay cover
Use these rails on the new 5 1/4-inch device if its rails are the wrong
4.
type (see "Removing or Installing Device Rails").
If the device already has the right type of rails, set aside the rails you
just removed for future use.
Note
Always keep unused rails; the bay cover cannot be replaced if
there are no rails within the bay.
Installing Options 4-33