Named material slot for procedural mesh (dynamic material)

Sorry if this is a newbie question, I’m still very new to programming UE4.

Is it possible to create a named material slot (slot name) for a procedural mesh? Similar to how it works for static meshes (

I’ve managed to copy the materials off a static mesh in the same blueprint (for testing) but it doesn’t keep the slot name once that’s done.

This is for a virtual production setting where videos and images are dynamically assigned to meshes due to their slot name but because I’m trying to get this working on a procedural mesh I can’t seem to find the option to generate a slot name.

BTW, this is all currently being done in Blueprints. Any help greatly appreciated, got a project soon that needs this to work!