sure, it is possible.
In the terminal, you need to navigate to the /srv/paws or /srv/paws/pwb
(I'm not sure as I usually delete user-config.py and user-fixes.py files
and then copy my user-config.py in /srv/paws/pwb).
For navigating to the directory you need to use the command "cd".
And then you can run the script which you want with "python3 pwb.py script".
If you have more questions, let me know and I will try to help you.