Download enterprise MIB files

From where do I download Mellanox Onyx enterprise MIB files? i.e. the files I see here: Network Management Interfaces - Onyx v3.8.2306 - NVIDIA Networking Docs

–sk

Go to the download center at https://support.mellanox.com/s/downloads-center.

Select Download → Switches and Gateways → Switch Software → Mellanox Onyx
Select More Files.

The MIB files are available there.