Audio Speaker Polarity -- How do you check?

[Bradster]

Thanks. Does the CD player need to be on for this test? Of course, the new speakers are marked positive and negative, I just don't know how it is wired at the back of the CD player unit. If I connect the battery to the wires, won't I have to perform the test where I connected the wires? Otherwise I assume it would test correctly at the speaker terminals

Thanks!