RAR archive of 182 KB for the Apple A1707 MacBook Pro 15-inch, logic board 820-00281, with the -10 suffix Apple uses to mark the board revision. The name does not state the contents, and at this size a boardview or firmware image is more likely than a schematic. Check the 820 number and revision on your logic board before using it. A boardview opens in OpenBoardView or FlexBV, and any firmware dump should only be flashed after reading and saving the original chip.
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 @ITHINKHS. 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)