We need key and key index to burn fuse for secure boot

We want to enable secure boot. We followed the instructions on NVIDIA DRIVE OS SDK Development Guide:
https://docs.nvidia.com/drive/drive_os_5.1.6.1L/nvvib_docs/index.html#page/DRIVE_OS_Linux_SDK_Development_Guide/Windows%20Systems/security_fskp.html

That’s what the article says:
Sharing an FSKP Key with the OEM
NVIDIA has a formal process to assign an FSKP key to an OEM. The participants in the process are:
• An FSKP owner who requests an FSKP key on behalf of the OEM.
• A key custodian who provides the key on behalf of NVIDIA.

We need more information about specific operational processes.