I am installing Pioneer 6x8 TS-A6870Rs speakers in my 1999 Contour LX. Everything is going well except I don't know how to connect the wires to the speakers. [Go ahead, laugh all you want.]

The stock Contour connector doesn't fit the Pioneers. So I plan to cut off the stock connector and splice on the connector that came with the Pioneers. But here's the problem: I need to know which wire (black with white stripe or white with purple stripe) should be connected to which tab on the speakers. The Pioneers have two tabs, and one tab is slightly larger than the other.

BTW, can someone tell me if it would do any harm if I mistakenly hooked the wires up backward? Or would the speaker just not work, until I hooked them up correctly?

Yes, I searched, but I was not enlightened.