RAR archive for a P5QL SE motherboard with revision 1.01G given in the name, a model in the ASUS P5Q family for Intel LGA775 processors. The 103 KB size points to a boardview or compact data file, although the contents are not specified. Unpack it and check the extension to choose the right program; boardview formats open in OpenBoardView, FlexBV or similar tools. Use it to locate parts and follow signals, and confirm the revision printed on the PCB matches 1.01G first.
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 @cyberlanelectonik. 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.