904 Leaking. What to check first?

Well, upon further research on this sight Ive come to learn much about the offices and common leak points on the 904. Before I disassembled anything, I decided to take a culmination of y’alls advice.
I filled the tranny to full line with it hot after driving an hour around town to make sure it’s at capacity.
I then cleaned the tranny as best I could.
Let it all dry.
I placed thin tissue paper around every possible leak area. I let the car sit 48 hours.
The leak is solely and certainly coming from the shift shaft. Not the pan! So I just ordered the tool and seal and will have at it this or next weekend. Planning on leaving the tranny in the car and the pan on and having a go with it with some patience, clamps, pry bar.
Photos below.
Thank you all.

76A61A00-9C2F-4A0E-A440-36B6490B912D.jpeg

456CF743-01F5-450D-82AD-B41B4D0AB7B1.jpeg

DF1748B0-E569-4CC5-A49A-38DB0D806B06.jpeg

D6D9ECCF-F7CB-42C5-97DC-1521D05225E7.jpeg

52ADEDCE-E453-4FEC-802F-682F4BD72733.jpeg

2DEE04E2-8A6E-4E83-AC86-BE2DC7DAE2B4.jpeg

54B04EB8-BB6D-4319-9109-A9720140A2DB.jpeg

C6F41C59-5AB6-47C2-82FA-17A2FC796AEB.jpeg