Where is my oil pressure switch, on my 97 opel corsa?

got the same problem on a corsa envoy x reg 1.litre oil preasure switch popped oil gusshing out mines at the front of engine with a wire connected to it easy job switch costs 6.99 then clean in take and out take hoses reconect wire top up oil and check again for leaks while engine running also before this clean up leaked oil or will smoke from engine

james
March 2010