(UE5) How do I choose a texture from a texture group/multiple textures in one file?

So I have a character from Mixamo, had to fix some skin issues, and I figured that out somehow, but I wanna know how to pick textures from this (I don’t know what it’s called) pack/map/group…

This is the current look on her face:

Texture group that came with it:

Here’s what the Material Graph looks like for the mouth:

I tried rotating it and whatnot but I can’t seem to figure out the right way to do this.
Any help is appreciated, thanks!