Because of this, you'll find the #2 spark plug towards the rear (firewall side) of the engine, likely on the passenger side of the vehicle. You'll need to consult a repair manual specific to your Windstar's year for a precise diagram showing the location and orientation of each plug. A diagram will be much more helpful than a general description.
Don't attempt to locate the spark plug without a proper repair manual. Misidentifying the spark plugs can lead to misfiring and engine damage.