A schematic diagram for Lenovo hardware (board NM-E481). Shared as “NM-E481 r7000p 2022 PDF.rar” — a .rar file, 5.43 MB.
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 @generalbios. 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.