Adding duplicate slots to the trinkets mod

I've never made a datapack before, and I was told that one was required to modify a mod that I'm using to get more hat slots. I've looked at tutorials, but none have my specific issue. I'm using the Visual Studio Code and 7zip applications, which I have no experience with. I've attached a screenshot of something I came up with, but I have no idea if it'll do what I want. Any suggestions would be greatly appreciated.