If it's the same kit that I got a few weeks ago for my 993 (also from HIDS4U), and if my memory serves me correctly, you should find that the red lead (male) connects to the yellow (female) lead and that the black lead (male) connects to the brown (female) lead. [So the black lead is not redundant - it connects to the brown lead. Wheras before the brown lead just connected to earth, it now connects to the black lead, which goes back to the ballast box]
Holding the strands of wire, it did not look like the leads would readily connect, so I was surprised when the red lead connected into the socket of the yellow lead with a reassuring click. The connection of the black lead into socket of the brown lead was less reassuring (no click), but still a good connection. I taped over the exposed metal bits with electrical tape for good measure.
You'll notice that the tip of the red lead is slightly fatter than that of the black lead, and that the yellow socket is bigger than the brown socket.
Let us know how it goes.