I went over it again last night with a powerful flashlight. There is absolutely no sign of oil anywhere near this plug. Everything above it is dry. I'm going to put a couple of wraps of paper towel around the connector, then a couple of wraps of plastic bag material and zip tie both ends. After a test ride, if there is oil on the paper towel, sealed inside the plastic bag, then it's coming thru the wire.
I worked for VW years ago. Had to diagnose a Coolant leak, under the dash board of an 86 Golf. It turned out to be a coolant sensor wire. It had a boot around the connector that sealed it so well, the liquid actually pushed up thru the core of the wire strands and formed drops at the connector under the dash.
Looking at the wire that goes to the neutral/gear switch, it's potted into epoxy, then goes into the motor. That looks like it seals the wire pretty good on the outside.