http://www.recording.org/ftopict-52044.html

[I've colorized the parts so you can see which are positive and negative]

If that's not the case, you'll notice the negative is the one that comes in contact with the sleeve.

In any case, you can follow the big tab that comes in contact with the tip to the positive solder tab.

Your greenback should either have a (+) or red dot to indicate the positive.

You'll just solder your 18 gauge (or heavier) wire from the jack (-) to the speaker (-),
then the jack (+) to the speaker (+) [ in no particular order ].

Give it a close visual inspection, to make sure you don't have anything shorting between the positive and negative signal paths.

If you can solder it neatly without any stray strands of wire and keep the polarity straight you're golden.

Some would prefer crimping a quick disconnect connector on the speaker end of the wire to make it easier to swap speakers later.

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=095-280

Personally I think soldering gives you a better connection. But, do whatever makes you happy.


I hope that helps.