Hi Luke!
Do you mind to share some pictures with us? This will give us some more insight!
You can also check this video about the tear down, maybe it will give you a hint about how to get it back together.
Video: [link|https://www.youtube.com/watch?v=2t61wgZ6GtM|Nintendo Switch 2 Joy-Con Teardown - Full Disassembly|new_window=true]
Please let us know if you have any more questions!