K8 wiring - best point to ground

[BikerRob]

Howdy,

I'm wiring in a powerlet outlet on my '08, and I was wondering where the best place is to ground it. I can't see where the battery ground leads to and there does not appear to be a ground for the wiring around the battery box. What do folks recommend?

Thanks!

 

[BikerRob]

Update - I ended up tracing the battery ground down under the tank to the engine and ran the outlet ground wire to that point.

 

[Powers739]

The battery (-) pole...