S/V/C s60R oil leak

Hey guys, Usually lurk on Sweedspeed and here but don't post here till now, but i know usually R's arnt on here that often, but wondering if you guys had any idea where this oil could be leaking from? it looks like a bolt,

Maybe a rear main seal?

https://vimeo.com/166859447

Any test I can do to test the leak? And find the source ?

Also any idea where that bolt is screwed into? what part is that?

Check rear cam seal area first. Clean the trans area with brake cleaner and blow it dry. Run car. If if comes out of hole then it's the rear main seal.

Check your PCV before you make any other repairs, because that looks like a decent amount of oil down there. If your PCV is clogged it'll push oil (and eventually the oil seals themselves) out of everywhere possible.

With engine running:
Remove engine oil dipstick
Place thumb over dipstick tube
Feel for pressure or slight vacuum

Pressure = clogged PCV
Vacuum = healthy PCV