Archive labelled P8H61-M2 SI, an H61 chipset desktop motherboard variant; the file name does not reveal whether it holds a boardview, schematic or something else. At 234 KB it is too small for a typical BIOS dump, so repair layout data is the likely content. Unpack the RAR and open the files in a suitable viewer after identifying the format. Check that the model and revision on the PCB match the SI variant, since the related TPM and USB3 versions differ in some parts and placements.
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 @boardview. 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.