Here's a hint, add a florescent dye to your oil, run it for a bit. Park it down hill and track it with a black light flash light. Did this a ton when I worked at a vw dealer.

Could be a rear main, oil builds up in bell housing and once parked down hill it drips out. But it's hard to explain why there is oil on the white starter/alt cable housing in the front of the pan. Oil creeps upwards but doesn't defy gravity. I think at this point, front main and cam seals, oil pan, and rear main are suspect and probably should be replaced. Yes, tons of work, but you know it's done right. Might as well do cam seals and vc gasket as well. A newly sealed engine.

But make sure the seal surfaces are smooth and clean of gouges and nicks. That will cause problems. Ive always disliked chasing oil leaks. They can be a total blast ��