Picar python modicifations

I have installed the picar-V (via github) software onto a raspberry pi 4 and setup a startup script for the django server in etc/rc.local on bootup. I want to make some enhancements to the python code but am unsure what source code to update. The *.py and *.pyc files seem to be scattered across multiple directories on the raspberry pi. So I am asking how to make python programing modifications and re-deploy. I am confused as to the multiple locations and copies of the various files.

Thank You

If you want to modify the content of the remote control part, you can modify