that's cool! thanks for the hint! looks like they work so far, plus I saw the extension are something like 24", I extended the wires way shorter than 24"..
I also set back to stock the computer with my SCT, tied the downstream sensors under the truck: no CEL light so far, but I just did a short test drive
I placed wideband sensors, and FAST A/F meter (I don't like its cosmetics :-( ), it works, I logged some data and played: looks like it's around Stoich when driving normal and around 12 WOT, but I have to make a proper test drive and eventually buy the RPM module so I can match all the data and print a graph!
I removed the center console, and found a small plastic filler (I think supposed for low gear stick on 4x4), removed it and carved a rectangular hole, then I run the cables through that, put some duct tape and placed the meter in the central console hung with a zip tie from the back side so nothing is visible but those ugly db-9 connectors