There is no install for the gauge, it has a page with all the pinouts for the ECU which tells you which wire is the O2 sensor signal. Its a 3 wire install man, comon dude, you don't need pics of it, you know how to do it lol.

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1999 Civic SI, Boosted and built, 12.67@112.

Gone but not forgotten.....
1998 Eagle Talon ESI, built and boosted 14.2@98
1992 Eagle Talon TSI AWD12.91@104
1992 Honda Hatch swapped and sprayed14.0@108