Wiring jb4 purple wire to obdIi

[M4Compguy]

I have a 2022 bmw m4 competition coupe xdrive.
I have purchased from fuel it , a port injection kit with the pi controller, i also have the jb4 tune in as well. I am
Having issues on where to put the purple
Wire. Instructions from fuel it say purple wire , pin 3 of jb4 obdII to pin 4 , what does that mean? I cant seem to get a solid answer from support and am very aggravated, what should be simple is taking forever, and i am good with wiring, but this has me stommped. Please someone help, how to wire the. Purple wire on the jb4 obdIi?

 

[M340EYE]

I have a 2022 bmw m4 competition coupe xdrive.
I have purchased from fuel it , a port injection kit with the pi controller, i also have the jb4 tune in as well. I am
Having issues on where to put the purple
Wire. Instructions from fuel it say purple wire , pin 3 of jb4 obdII to pin 4 , what does that mean? I cant seem to get a solid answer from support and am very aggravated, what should be simple is taking forever, and i am good with wiring, but this has me stommped. Please someone help, how to wire the. Purple wire on the jb4 obdIi?

I have a B58 Gen 2 with the same issue, cannot find any information on where the Purple cable on the BMS PI should attach as my JB4 OBDII is also a 2 pin not 4 pin version, how did you fix this?