Diagnosing leaking turbo pedestal

[belz]

I have an oil leak in the back of the motor somewhere. Other than a rear main I know it is typically the pedestal o-rings. How can I check if they are my problem. I have no oil in the valley. Where do I need to look? I guess maybe just an extendable mirror and look around? Any help would be appreciated. I don't wanna misdiagnose and spend money unnecessarily.

[jc82chevyman]

usually the pedistal will be covered in oil