Where would oil be leaking from if it's the valve cover gasket? on 1999 Suzuki Grand Vitara

How do I know if the valve cover gasket is leaking? Where is it exactly?

Valve cover gaskets are below the tinny covers over the heads. Never worked on a V-6 Vitara, but here is a pick of a Chevy 350. where it says Chevrolet with the chevy sign, those are the valve covers.Usually only a few bolts to pull off, gaskets are cheap. ANyone with a better pick?