I'm helping my son tune his 2011 Nightster with the Power Vision he just got. I'm very familiar with tuning on the Power Vision, but I've never put one on a Sportster.

Just checking where I will find the diagnostic port the Power Vision gets plugged into on a 2011 Nightster?

 

4pin connector with cover under left side cover, if memory serves me. Next to or under battery. It may have a sealing cover.

 

Beside the battery (primary/left side of bike) it's a grey connection that probably has a rubber stopper in it.

 

Thank you both!