Applying materials for export to fbx (game asset) in 2.8

Greetings!

I’m trying to finally aquaint myself with blender 2.8 and tasked myself a simple goal of attaching 5 material layers to an asset to export as a game asset (.fbx in this case).

As the blender render is no longer option, I no longer see an equivalent to the influence tap (in the textures panel). I UV mapped and started adding materials with the principled shader then realized… there is no obvious place to attach my occlusion or emissive map. Can anyone explain what I’m doing wrong? perhaps the principled shader is the wrong approach? I’m just trying to add these 6 textures to their appropriate channels for export (diffuse, metal, roughness, normal occlusion, emissive).

Any tips would be appreciated.

Thanks!