Yes, all by my hand.
I go to your github repository:GitHub - ich777/unraid-nvidia-driver,click Code-->Download ZIP to download .plg file and source folder.
Then click releases to download .txz files : nvidia-driver-2022.10.05.txz and nvidia-515.86.01-5.19.17-Unraid-1.txz.
After downloading all files, put .plg file in flash/config/plugin, add a new folder in flash/config/plugin named nvidia-driver, put folder source settings.cfg and 2 .txz files above into it.
Back to Unraid WebUI,click Plugins--> Install plugin-->Select local plugin file, go to /config/plugin choose nvidia-driver.plg and it will Install locally.
My English is not very good, don't know wether I'm explain clearly.