Getting OSC to Change Material Paramters

Hi Everyone,

So, my question is that I am in Unreal and learning how to make audio reactive / interactive effects using OSC via Touchdesigner. I had gotten to the point where I would like to use OSC Parameters to change the parameters of a Material, like its roughness and metallic.

I know that those values are scalar in comparison to the vectors for color.
So down below I have my material, as well as my material instance called
" Cube
Test Mat"

I tried to see if this Event (That works with other OSC actions like changing the parameters of particles and location of Meshes), if true, can give me the values of the Metallic Channel in TD, and change the values of the Metallic parameter in my material.

Does anyone know of any leads of how I may go across this? Do I have the order of nodes wrong?
Which ones should I use?
Photos will be down below.

Appreciate you! (っ °Д °;)っ