Please tell me somebody.Where are the spark plug's on the petrol engine of a vauxhall vectra 1.6?

Hi .I have just bought a vauxhall vectra 16 valve ,year 2000 ,but i can't find the spark plugs.I had a carlton and they were on the side of the engine,Can anybody tell me where they are now in the vectra,they must be covered up somewhere...Regard's TJ