You need some spade connectors to put the exposed red and black wires into (each wire seperately into its own connector, which you can then slide onto the connections on the back of the speakers. Or you could just tape them on with electrical tape, but I woudn't recommend that for a permanent solution.
Here is a picture of the spade connectors..
If you bought a new set of speakers, they should include these connectors in the accessories that come in the box.
If this isn't your issue, you can try retyping your question differently.
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