S-AFC wiring - Yep need help with this dinosaur
 

I bought a sweet vintage apexi super afc as i need it just for touch up corrections on my S4 camden charged fc.
I found this picture which gives me just about all the info i need but im unsure about two wires.

I also know to hook up the grey tps wire to the boost sensor instead of the tps as it will give a wider reading.

So i really only need to know about two wires which im a bit confused about. I did some searching but all links are dead (go figure)

Im assuming "air flow signal" in the picture is ment for the yellow wire so im lost about where the white wire is tee into and where the grey wire should go on the boost sensor. Any help would be greatly appreciated.

Attachment 629345

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Air flow signal wire gets cut, yellow wire connects to wire coming out of ecu, white wire connects to the other end. All other wires just spliced in line

Ahh and now i understand. Thank you.