I would imagine there is a park position in the range shifter because there isn't a park brake lever visible in the photos that would clearly show it if it were there. It's still a 2020 or 2030, as ALL 3010's and 3020's had the shifter to the right of the steering column.
Check the 3010 photo here:
Google Image Result for http://www.joetraktor.com/images/JD3010_01wmmd.jpg
and 2020 photo here:
http://www.(Temporarily blocked due to reports of company closure)/v/vspfiles/assets/images/john-deere-2020.jpg