I'm taking more pictures of the interior of my P101 today/this weekend. The tonneau cover does have a leather-wrapped cushion on the driver's side edge. The cover comes off very easily, but you can't leave the leather armrest on if you want to put the cover on.
I've been trying to think of how I could attach strong magnets to the mount holes of the armrest so it could be quickly added & removed should I want to take a passenger (and I've enjoyed taking all my passengers this week