converting MaterialFunctions to the new MaterialLayers question/help

Hello All,

I have short question.

I have been looking into the new material layers (setup) and following some unreal tutorials.
Downloading some materials from Paragon such as ML_LowContrastHardmetal this is Material function using the old system.
So what I have seen and learned with tutorials that I need to adjust it with the new MaterialLayers
system to get it working.

I have copied all the nodes from the ML_LowContrastHardMetal which is a material function into new the MaterialLayer setup 4.20
How do I connect it up correctly? I have included a screenshot.

Can anybody show me how to fix it. Thank you.