A schematic diagram (board 6050A2412601). Shared as “RKY15DN-6050A2412601-MB-A02-1228 PDF .rar” — a .rar file, 125 KB.
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.
7-ZipWinRARThe Unarchiver (macOS)