Help Id this homemade device

3rdworlder

TDPRI Member
Joined
Jul 16, 2021
Posts
50
Age
46
Location
Santiago de Chile
It's powered by a 9V battery and I can see two loose connections inside (please see pictures below). And in case you can identify what is it, any idea where do I solder those loose connections to make it work?

Thanks in advance!
Y'all have a fantastic Wednesday! :)

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