Help with Rosary

*Please, no judgement.* I posted this in another group that was more appropriate, but that group hasn’t had action since April.

My daughter has a Rosary that we keep away. She found it and was playing with it and she disconnected it. I put it back together without realizing she had taken another piece off (see below).

How do I put this back together? Where does that small piece belong on the Rosary?

Thanks so much!