Help with Material Manager

I’m just starting to get into the Material Manager in Roblox Studio and learning how to upload textures, but I don’t think I’m doing it right as the texture keeps coming out too dark.
In Material Manager the four texture maps needed are: Color, Metalness, Normal, and Roughness
The texture maps on the texture website look like this:
c2ee40c06f5f9a7b3a23fd7ff41c7777
I’ve been downloading; Diffuse for Color, AO/Rough/Metal for Metalness, Normal for Normal, and Rough for Roughness

My problem is that when I add in the Metal texture map, the texture becomes very dark (example below):


Without Metalness

With Metalness

If anyone could let me know why this is happening and what I can do to fix it, or even if I’m making a mistake, that would be awesome, thanks!