Sorry to bother. Been working on a chinese copy of a Yamaha Wolverine/Kodiak (and probably a few others)

I've been using the service manual for the Kodiak as the wiring looks nearly identical. BUt i can't figure out how the frame is grounded. Looking at the wiring diagram it just branches off the negative lead fromt he battery and then into a connector and then just ends? I'm thinking all these black line connections are just routed together and then grounded elsewhere but i'm not sure where. My particular ATV doesn't seem to have this cable off the negative terminal and i'm unsure if it was removed by a previous owner or just not installed.
Does anyone have a picture of it?

 

ground cable is usually only 10-12" long and connect close to the battery.