Installing Apexi AVC-R, need wireing help
 

Morning everyone, I've searched the forum fairly thoroughly and cannot seem to find the information I need at this time.
I've tried pouring over the RX-8 manual, but without power hooked up to the car, I doubt I’ll be able to figure out what wires I need.
I am installing the Apexi AVC-R EBC and need to find out what wires I would take for signals. I have the harness run inside the car and would like to tap the wires from behind the gauge cluster if possible for Speed and RPM signal.
I would like to take throttle position from inside too if possible as the car is drive by wire, there should be some signal sent from the peddle connection.
I have attached a picture of the wiring harness diagram directly from the Apexi.
I'm decent with wiring, not the greatest at reading wiring diagrams, but I can do it. Installing wiring isn't an issue; I just need help diagnosing it.
Let me know if there is any more information I need to provide. Thanks in advance guys.

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Install in question
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wish i could help. i am surprised no post's. looks like a nice setup, hope u figure it out