Although catalogued as a schematic, the name points to a firmware image for a Realtek RTS5452 USB-C controller, labelled U35 and WIN4 with CRC32 0x4D8B1FCD; the small 55 KB RAR fits a PD dump rather than diagrams. U35 likely refers to the controller position on the board, and WIN4 to the device, though no brand is given. Open the archive to confirm the content. If it is a dump, write it to the matching chip with an SPI programmer after backing up the original, and check the checksum.
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 @biosdumpcomputer. 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.