A schematic diagram for Microsoft hardware. Shared as “Surface pro 5, M1007506-015.rar” — a .rar file, 12.9 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 @Laptopbiossolutions. 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.