use the 'audio out' cinch plugs from your receiver if there is an input provided on the rear speaker set.
Otherwise you'll have to open the speakers, so you can wire directly to the drivers after unhooking the original wires.
If you don't have basic understanding about this, maybe leave it to someone else.
Or you can post pictures of the back of you're speaker set so we can have a look at the possibilities first, before you rip them open.