i havent seen a sub box that doesnt have those wires already in it, that being said, not alot of companies make subs that are square, and when i had my 15l7 i the box came pre wired, just hook it up and go and i bought mine seperately from the box, if that doesnt work go get a 4 dollar roll of speaker wire, and get a wiring kit (if you dont have crimpers, connectors, that deal)