A 1.55 MB RAR archive for board 5LXWL at revision suffix RH-10, a sibling of the RH-11 package from the same series. What the archive contains is not indicated by its name. Unpack it with 7-Zip or WinRAR before relying on it. For schematics or boardviews, compare the reference designators against the actual board. For a firmware image, make sure its size matches the flash chip capacity and dump the original chip with a programmer before writing anything.
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)