OpenCore - How to generate SSDT with Sandy Bridge and MacPro6,1

Hi guys, I have read the whole OpenCore documentation but I am stuck in a post Installation step.

I am running a i7 2600k Sandy Bridge, trying to set the power management:

https://dortania.github.io/OpenCore-Post-Install/universal/pm.html#sandy-and-ivy-bridge-power-management

In this step (https://dortania.github.io/OpenCore-Install-Guide/config.plist/sandy-bridge.html#platforminfo) I chose MacPro6,1 because the description said the following "Mojave and newer SMBIOS", I am running the last version Catalina.

However when I try to use ssdtPRGen it does not provide a Sandy Bridge combination with MacPro6,1.

Any idea how can I solve this?