How to import a custom template as armor

Hello,
I am looking for a way to create a mod where I can import wings with their animation. I have created the model from blockbench and exported it to java class.

I think I need to load it as armor so that it can be equipped on the player's back. But I can't figure out how to import my custom model as armor

https://youtu.be/RetcgoWZzjY