So i found out that the purple/white wire is the signal wire for my rear O2 sensor. I want to hook up my wideband through this so that i can log actual AFR and use the AFR% error histograms.
I have a AEM wideband and i was wondering do i just need to cut the purple/white signal wire from the rear O2 sensor and hook it up to the 0-5V output on my wideband?? I realize that i will have to do come custom PID work but i think i got all that figured out. Do i leave the other wiers from the second O2 sensor hooked up as they were?? Or should i disconnect all of the wiers and just hook up the signal one??

I was looking into installing a Innovate DLG-1 https://www.summitracing.com/parts/inn-3891/overview/ I looked it up on you tube and found the a video where they installed it in the rear o2 bungs behind the hiflow cats on a 16 Camaro SS with LT headers. Thought that would be convenient. Then I read the instructions for the gauge and it said not to install after the cats as it will skew the reading lean. Iv seen tuners tune with the o2 in the exhaust tip. Is having the o2s installed after the high flow cats ok? https://www.youtube.com/watch?v=UcXNO-SrjXI