Hi Greg I have it on my set up
I used a button on my steering wheel (a Sparco one) I just oush the button and rolling anti lag is activated on any CAL
Its activated via a ground. So one end to a ground and the other to the ECU so when the button is pushed the ecu make the connection with the ground and hey presto.
If you want to do it the same way I have so no wires get tangled up while steering there are a few spare points you can solder the wire to on the steering slip ring so it like stock
The ground I used was the one for the horn button on the steering wheel boss and soldered that to one of the spare connections on the steering slip ring (the same way the horn is when it comes out the factory)
And then soldered a wire to the corresponding plate on the steering wheel rack side of the slip ring and let the wire to the ECU for Romain to plug in and set up.
At this point I felt such a boss at soldering I used the other Sparco button to my head unit for puch to talk like a modern car to control my audio and sat nav via my voice.
Of cause everyone thinks I have NOS because of the buttons lol
But if you want this more "professional" job route the corresponding soling points are mirrored
Hope below make sense. If not PM me and I will give you my number and you can call me... for advice not a date
Steering wheel Side
1 ------ 2------- 3 ------ 4
Horn - Airbag - Blank - Blank
1 ------ 2 ------ 3 ------- 4
Blank - Blank - Airbag - Horn
Steering Rack Side
It works flawless, in say 3rd hold it down at a low rev range, push the button, foot to the floor, engine note changes and after a 2 or 3 seconds you have full boost. Its good fun.
But exhaust gas temps can get high using it so not to over abuse at once
But I will not take full credit on this, Jamie Foster advised me how to do mine so I am just sharing the love