For my school project I need to find if curcumin has binding sites in P01106 (UniProt ID). My steps were 1)build a model 2)find ligand biding sites(castP) 3)find structural coordinates of curcumin 4)Molecular Docking using AutoDock

I found a 3D model for this protein in modbase and I also constructed a new model using SWISS-MODEL which is very similar to modbase model

I am trying to find ligand binding cavities within the above model using castP server. But I am not sure how exactly to start with?

How to find coordinates of curcumin?