This is the short version. When I searched I found a lot of info for the VIII's but not the IX's. Alot of the info wasnt confirmed either.
Using the MT-6 HKS Harness is pretty much straight forward intall on the steering column. The grey wire from the TT is going to the parking brake Blue/Red wire.

The RPM signal and the Speed Signal wires from the timer are connected like so on the ECU

First is the RPM Signal Brown Wire from the TT goes in the brown/green wire on the ECU like Pic 1
This is the Middle Harness


Now the Speed wire Blue Wire from the TT goes to the black/yellow wire on the harness like pic 2
This is the first harness from left to right


last but not least a Thanks to Sam @ SRT for the TT and the Harness...

 

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