Done!
I measured the exact location I wanted and size.

I drew the circle with a permanent black fine tip marker.

Then I used a very sharp utilitily knife (like a razor blade)

and SLOWLY cut around the circle I drew.
Then I peeled the cut piece of leather off, drilled the hole smaller than I needed and used a step bit to slowly work up to the size I needed.
It turns out that I undercut the leather

, so I had to trim it once again.
Then I cleaned up the back of whole and it came out absolutely perfect!
Now I need to put the switch in and vacuum. . .
Thanks again!
