Chose one material from three materials for multi-objective purpose

Hi everyone,
I’m looking for a way to find best the material from a group of material for optimization energy in honeybee. My problem is how can I connect materials to a slider for connecting with Gense in Wallacei?

You should use an item selector with a slider.

Thanks Mostapha, I used item selector for my EPconstruction, then it connected to EP Zone Construction.