Compressed archive named only for the ECS J10IL1 board, 844 KB in size, with no revision or content details given. Because the revision is missing, verify carefully that the board in hand carries the same code and check any revision marking on it against the document title pages. Files of this kind normally contain a schematic used to trace supply rails, find test points and isolate shorted components. Extract it with 7-Zip or WinRAR and read the title block on the first page to confirm the exact revision covered.
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.