[Image of spark plug cable diagram]
The numbers on the diagram correspond to the cylinder numbers. The spark plug cables should be connected to the spark plugs in the order shown in the diagram.
Please note that this diagram is for a 1998 Buick Century with a 3.1L V6 engine. If you have a different engine, the spark plug cable diagram may be different. Please consult your vehicle's owner's manual or a qualified mechanic for more information.