Second part, 755 MB, of a multi-volume RAR set labelled Adobe Lightroom Classic version 14.5, multilingual. It is photo-editing software, not a repair document, so it contains no board data, schematic or firmware. A split RAR volume cannot be extracted alone: part1 must sit in the same folder, and extraction is started from the first volume in WinRAR or 7-Zip. If any part is missing or corrupted, the whole set fails. Scan unofficial software packages for malware before installing them.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @laptopschematics. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.