if there are holes then look inside for speaker wire. if you dont see any then no its not set up. but you can probably wire some right into the radio. it has to have pigtails for more speaker hanging out the back. i dont know what color the wires will be but speaker wires always come in color pairs, whether it be gray, purple green... the one with a stripe on it is grownd and solid one is pos. you can figure out wich is left and right by doing an audo check. honestly if its an aftermarket unit, you have atleast a 50% chance that everything in the back is labeled.