Heck, you can go to any well equipped dollar store an pickup any red/wite (or yellow) cable with RCA ends on it of a suitable length and use any single cable and leave the others dangling. Or, you might be able to neatly pull them apart. Then you'll have two "subwoofer" cables for the price of one. That's what I did and I would up wit two 12' sub cables, one with red plugs, one with white, for a buck..
Color doesn't matter as long as it doesn't clash with the rug. (joke)