UV Matching Not Working for Full Body Mesh

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Hey everyone,

I've created a ring that I would like tracked onto a finger using full body mesh. The proximity matching isn't quite close enough, though, so I'm attempting to use UV matching. The problem is that the UV mapping doesn't seem to work.

I'm sure it's something simple, but for the life of me, I haven't been able to figure it out.

Here are some screenshots:

[https://drive.google.com/file/d/1jf5DSBdm8dyyxp5UQDdpYP2zog3aS3Bb/view?usp=sharing]

[https://drive.google.com/file/d/1FsygUfwVzDbnxI-0TvuKeqT3pdJCV9mR/view?usp=sharing]

The last picture shows my UV unwrapping. I used the full body mesh UV as a guideline to know where to unwrap my ring. Is this the right approach?