Hi @QAB
This paths you are searching are not in filesystem (not physical), are virtual and parsed in route rotine scripts to be accessed via browser , e.g.: ojs-site.com/index.php/t1 .
But, changes you want to do are not related with this, but with backend. To modify it can be a little tricky, please see here:
Regards,
Israel Cefrin
Public Knowledge Project Team