How to change default boot option for OpenCore

It used to choose the last volume when I boot up into OpenCore, allowing me to ignore the prompts and let OS Success' href='/2020/12/install-macos-catalina-on-supported-pc.html'>Catalina boot as normally. For some reason recently, It has been locked to the first EFI partition (Which Is actually a separate drive carrying a separate test version of MacOS).

I would like to change the default boot option, and I assume it would be in the config.plist, however cannot find anything related. TIA

Author: @KoreanSeats