Well, most of my pants have a single black circular oil stain on my accelerator leg

so I assume it's coming from the right side, but it could also be dribbling down some wire or something and dripping there.
I'll make notes tomorrow during the day and let you know-- I do know the back of the cluster seemed to be fine when I pulled it out to wire in the grounds to the seat warmers. This problem predates that by about a year
I'll also make a mental note to not park the car on a hill whenever I do the rear differential mount