Great photo. That is all I needed.
As for the woofers--the circuit board has provided for a connection to two woofers.
If you connected two woofers using the wires provided, it would be a parallel connection.
This means, that if you connected two 8-ohm woofers using both sets of wires, it would be wired for 4-ohms.
But, you can use just one woofer and one set of wires.
It doesn't matter which set, because they're the same.
Now for the tweeters--
I'll attempt to re-create the explanation which got lost in cyberspace.
If you were to make a direct connection to your tweeter from the Tweeter + and - connection on the board, you would have no attenuation added in.
If you wanted some attenuation added in, you could insert a resistor in line with the - side connection. This is done for you on the board.
So, if you want no attenuation, use the Tweeter + and - connections.
If you want some attenuation, do not use the Tweeter + or - connection.
For tweeter attenuation, connect the Red tweeter wire to the + terminal on the tweeter.
Which wire you connect to the - terminal on the tweeter depends on how much tweeter attenuation you want.
If you want 1 dB of attenuation, connect the Yellow wire to the - terminal on the tweeter. OR...
For 3 dB of tweeter attenuation, connect the Blue wire to the - terminal on the tweeter. OR...
For 5 dB of attenuation, connect the Black wire to the - terminal on the tweeter.
And, yes it would be best to tape the unused woofer wires, so they can't short to each other or to anything else inside the box. Also, secure them so they won't rattle. Or, just cut them off.
Hope this helps.
"A man hears what he wants to hear and disregards the rest." --Paul Simon The Boxer