MHS speaker and battery holder question

[Dendore]

The picture of this (http://www.thecustomsabershop.com/MHS-speaker-and-battery-holder-P315.aspx) item shows 3 wires coming off of it. However the battery pack normally has 2, and a speaker normally has 2. So I would think there should be 4 wires. Am I missing something? Could someone please explain how this wires up.

[Lord Maul]

There are 4 wires, it's just the angle of the picture.

Red and black are battery
Blue and Green are speaker

[sfer1]

BTW, blue is the speaker positive and green the speaker negative.

[Novastar]

Although in GENERAL (with miniature high power speakers that are functioning in a "mono" world)... speaker + and - are irrelevant.

It's almost the same idea as wiring up a vibration motor. Polarity becomes quite irrelevant.