So I got around to putting in the xmas gifts all the way today. It took me a bit to figure out the wiring since I couldn't find anybody describing this set up so here it is.
After getting everything installed and you have removed the blue wire from the harness for the valenti bar you need to run that to the red wire in the diode dynamic kit coming from the female plug connected to the car's original male plug for the tail light housing (before it goes into the black terminal box).
Next, the red trigger wire from the valenti light bar needs to go to the yellow wire in the diode dynamic kit coming from the female plug connected to the car's original male plug for the tail light housing (before it goes into the black terminal box).
You have to do it this way because if you tap after the black box going into the OEM tail assembly the yellow wire will cause the lower light bar to flash non stop since it will constantly be triggered by the signal to flash the OEM stop light as a turn signal.
The video is on youtube since I can't seem to get it to embed.
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The Mod Bargain video was good up until the wiring point because the valenti tails were color coded together to make it a sinch to wire up. The page number in the above image refers to the FR-S shop manual listed in this forum section for reference.