This page ships a chunked bundle: a small entry file plus lazily loaded chunks. Clicking the button only pulls one of them.
Goal: find the chunk nothing ever loads and the admin route it builds.
The Network tab will never show the interesting file. Read the entry bundle /JSRECON/js/l2.main.js instead and look at its chunk manifest.
Two chunk names are mapped; the UI only ever requests key p. Fetch the other chunk file directly.
The orphan chunk stores its URL as four base64 fragments that get joined at call time. atob() each one, concatenate, and request the result - the query string is part of it.