QT6 motherboard archive marked UMA, meaning the integrated-graphics version without a discrete GPU, in a 145 KB RAR. The document type is not stated, though the size suggests boardview data. UMA and discrete-graphics versions often share a PCB number but differ in populated parts, so confirm your board is the UMA version before relying on component locations. Open the extracted file in a boardview program and check the silkscreened board code against the data.
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.
7-ZipWinRARThe Unarchiver (macOS)