No, no NVIDA inject in EFI/CLOVER/config.plist
Did you use bootflag nv_disable=1 until Webdrivers where installed ?
I suppose you did an Webdriver install before using nvda_drv=1 ? latest is here
This app.can update and search new drivers and download and then install them automaticaly !
Understand that a clean Sierra PB2 install contains already Nvidia drivers but your card is not natively recognized !
The alternative Webdrivers you need are beta
My Clover folder doesn't help you beacause we have very different hardware and the Webdriver are not in EFI/CLOVER !