Theduderino wrote on 10/19/21 at 04:10:57:It looks like the rubber seal for the neutral safety switch
After cleaning, Dan Stafford is the genius I think, if "the rubber seal for the neutral safety switch" is that black boxy port the wires go into, encircled in green in an earlier photo. Then the oil runs down and pool on a bolt and drips to the floor or blows across the underbelly of the case cover. Pulley doesn't seem involved.
Here's a more thorough video tour:
https://youtu.be/vuSoFuWJgbI