MSI motherboard archive for model MS-7636 at revision 1.3, 1.31 MB in RAR format. The catalogue also holds a revision 1.0 set for this board, and the two may differ in parts and routing, so verify the REV printed on your PCB first. The name does not state the contents, but MSI board archives usually contain schematics or boardview files. They are useful for following power rails, measuring against reference voltages and locating a failed component on the board.
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 @IT_SERVICE_WORLD. 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.
7-ZipWinRARThe Unarchiver (macOS)