Nope, the metal box is your ballast. I outlined what goes where in your picture from your first post.
The plug on your bulb that i circled in red plugs into the ballast (the box)
The two that are circled in blue plug into the two on your ballast
The ones circled in yellow should plug in to the plug for your fog light bulbs, in your car. The positive wire should go to the positive, and negative to the negative.
Hope this helped clarify it a little.