What type of adapter do I need to turn my dvd player and sattelite speakers into a home theater?

When you buy a home theater, you basically get a dvd player and speakers. I have a really good dvd player, and I have speakers that a friend gave me, How can I turn this into a home theater? The dvd player has basic audio in/out jacks on the back. Is there an adapter that i can hook all of my speaker wires into, and then plug that into the audio jacks on my dvd player?

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