Archive named 3CCWL-RH-10, holding about 1.95 MB of unspecified content with no brand or model given. The pattern resembles the other 3xxxx-RH board codes in this collection, and RH-10 is probably a revision, though the name does not say so. Extract it to find out whether it contains a flash dump or documents. Match the code against the board label before relying on it. If you program a chip with it, read and archive the existing data first and check that the sizes match.
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 @schematicslaptop. 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.