Hey all, i have just purchased some new 6x9's for my rear quarters, but i need some help with the standard mini wiring.

The speaker wires on the drivers side are blue and one has purple stripes and the other grey stripes, on the passenger side the wires are yellow, one with black stripes and the other grey stripes, what i need to know is which of the wires are + plus and - negative, as there are no indications as to which, is which.

Any help appreciated, thanks tim