More likely it'* the LIM/block seal in the back corner where that seal is pinched between the head, top edge of the block, and LIM. The 'tip' of the wedge erodes and leaks oil. It'* a non-pressure oil leak that comes from lifter splash. Nothing cirtical, but keep an eye on it over time. You'll never lose great volumes of oil from it. The reason you see it back behind #6 is because the wind blows it back there while driving.
In the pic above, you see the two pushrods for #6? Just to the right of it you'll see where
the top edge of the block has a black seal laying on it (front to rear) and spans from front
to rear head. You'll see if you look carefully that I've got a little dab of black sealant gobbed
on at the corner. The prongs of the orange TPS connector are pointing right at it.
It may be possible to get your hand in there on a cold engine, above the crossover, and
behind the TB to feel it.
Or a valve cover leak if you don't feel it in there.