im working on tucking this harness on a friends car. ive seen a few harness around that dont have this plug. just wondering what you are doing with it or if only some k harnesses come with this. its on what i believe is a k20a2 harness

 

my damn Z1 harness has that dumb as plug on it too and we are still wondering about what to do with it also....

don't even know what it's purpose is.. just a loop check point or something