An archive of repair files (board 12311-1). Shared as “DOH50_MB_12311-1_KWC14_REV_A00_.rar” — a .rar file, 8.00 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 @schematics_bios. 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)