Took a quick peek.
Looks a lot better this way.
Thanks to the colors and less crossings i can see what's going on.
It seems that you did have the capacitors correct, but the small black lines connected both pins.
Now they are connected to the motor with one pin, and with nothing for the other pin.
Place the capacitors at the same spot the were before and all is good there.
You accidentially connected all green wires of the upper motors with GND because you extended them exactly where the GND wires run on your breadboard.
Consider wiring all enable lines to an output that is PWM capable.
The datasheet isn't clear about it, but probably you can control motorspeed this way if you decide to try that.
I haven't checked with Fritzing! yet, just took a peek at the picture.