Want to swap Nier Automata decorative back pieces with the magic ring mesh/textures onto the weapons without them

[Bloopydoop]

Hello, I've been trying to swap the decorative back pieces with the magic ring textures from https://www.patreon.com/posts/9204-nier-2b-by-19195156 but I don't really have any idea how to use nifskope or how to link the ring texture either. I saw someone was able to do it on youtube but they have been inactive for awhile and don't usually post how they do things but here is an example of what I was trying to mimic  https://www.youtube.com/watch?v=PzFHg1Kzyzg  If someone who is better with nifskope than me is able to take the time to help me swap out the meshes from the actual weapons in the pack and add the ring texture from the decorative back pieces onto them I'd be grateful. Or if someone has already done this before and has the nier weapons with the ring mesh/texture on it and aren't allowed to post it publicly feel free to send it to me in DMs. (I use legendary edition by the way)