Feedback Need advice On Panel Slot control.

I'm trying to build a UI system with many features for a collab build. I would like to find a way to have on 1 panel specific first my panel have 7 slots for ship parts that are upgradable. default tier 1 would take in tier 1 parts only if the slot is unlocked. there are tiers 1 through 7 and each tier is unlocked by players level. Each slot would have to have a list of objects it can hold, and those items would be of PartType match to slots Parts Type enum. I want to be able to set up these mono behavior scripts in the scene with an editor window so that they are permanently set for when game is built, and be able to edit everything from one location later. any advice on this would help. I have some code I've started with, but I feel like I'm executing it wrong.

Link to the code on github