Gear box leak on 2003 Porsche 911

I have a leak which I think is coming out of the top of the gear box which I cannot see...what could be causing the leak which sends the gear lube down the gear box and causes it to become completly wet and drip. Or could it be engine oil leaking out of the top of the engine on top of the gear box and running down. Do you think it is the gear box or engine leaking oil?

Asked by for the 2003 Porsche 911
Is the engine oil level correct, if so then you must have a gearbox leak