1986 intruder battery wiring
 

I have a 1986 intruder and when the previous owner had it the battery box fell off and the battery cables went with it. I ordered new battery cables for it and I am trying to figure out where the ground wire goes to the frame and where the little pig tail connects to. I know where the black and white wire goes it is the black and brown one that I don't. Any help would be grate.
https://cimg9.ibsrv.net/gimg/suzukif...63e2443786.jpg