Hello and welcome to Just answer.com, Super mechanic here. About your vehicle.
One of the spark plugs will be under each one of the coils and the other is at the end of the ignition wire that comes out from the coil for the other cylinders. Notice picture 'M' in the diagram, it shows both of the coils. When you take the coils out you can get to the plugs with a long exention and a spark plug socket.