I bought a cheap pair of speakers (2 speakers and a subwoofer). The SW has
an AC cord. The 2 speakers have wires that merge into one jack.

My Sound card has a L out and R out, and a Cen/Sub port.

How do I hook these up? Do I plug both the speakers and SW in the card,
even though I don't have a L and R for the speakers? Or do I plug the
speakers into the SW? The SW has an In and Out port.

Sorry to be dense. Appreciate any help.