The "part2.rar" file you are looking for is typically part of a multi-volume archive. Because these patches are large (the full game can be ~40 GB), creators split them into smaller parts to make downloading easier.
Files are usually in .rar or .7z format. You will need all parts (Part 1, Part 2, etc.) in the same folder to extract them correctly. Installation Guide The "part2
The (often referred to as Super Star Patch v2 or v3) is a popular modification for eFootball PES 2021 and PES 2017 that adds licensed teams, competitions like the CAF Champions League, and updated rosters. Download and Technical Details competitions like the CAF Champions League
