I'm afraid I still don't understand. The ones next to each other, are they both Ground?
Anyway, this is how I've tested mine (be it statically!) the two plugcables facing each other sharing (and waisting) a spark. The black stripes are 7 mm apart. BTW, the white 'stripe' you see is not a spark, but a mere reflection of light. Has any of you seen that tester in the Honda fig. in real life/ Is it capable of testing dynamically?