How to edit the output of java scripts in Joomla?

Question

Joomla

I have never used Joomla, but there is a task to change the paths of two scripts that are connected incorrectly.
They are connected through this code in index.php From Google I found out that this head is located along the path: /libraries/joomla/document/html/renderer/head.php The problem is that I do not have a document folder along this path. I don’t understand where to drip further) Then I ask for help from you.
<jdoc:include type="head" />