Apparently its hard to find documentation on how to silently install Nvidia display drivers without Geforce experience from a batch file (and possibly doing it from BatchWinInstaller (https://github.com/devtee/batch-win-installer)
https://community.spiceworks.com/t/silent-install-nvidia-drivers-without-geforce-experience/1014066 comes close with some but not all command line options
https://github.com/lord-carlos/nvidia-update/ offers some clues as to how to do it but involves removes files from the installer which isn't something I'm keen on doing.
The search continues.....
Update on this - finally figured out how to install/upgrade Nvidia display drivers without Geforce experience from a Batchfile
- unpack the nvidia driver for Windows (game driver or studio driver) using 7-zip to a folder.
in that folder run setup.exe (as admin)
setup.exe -passive -noreboot -noeula -nofinish -s Display.Driver Display.PhysX HDAudio.Driver