On top of the valley pan. Best I can tell my turbo oil supply lines, sender, and mechanical psi gauge plumbing is all dry.

https://photos.app.goo.gl/Qy5YPYfrHFYd4Qyq5

All over the side of the engine, the trans dipstick is in the way a bit, I couldn't get a photo without it. It seems to be oily around the manifold but all along the head to block seem as well.
linking to it so the full res photo is available (you're looking at it from underneath the pass side at my upside down RV manifold on the turbo set up):

https://photos.app.goo.gl/FpGaZmiNwCSVmDDt7
https://photos.app.goo.gl/itLFtLqeouC8MYQD8

side photo for reference (engine wasn't so oily 6yrs ago either)
https://photos.app.goo.gl/a8N8mqhSNuGPA7at7
There's definitely some oil making it around the manifold even though the valve cover doesn't look nearly as wet as it should be for all the oil on the side of the engine