If I'm understanding correctly, you wanted the parts to hookup a second battery?
Not even close.
Nor I.
I wanted to mount the spare tray to my rack so I could carry a spare Rad supplied OEM battery that could be cold swapped on the road (NOT switched, the bike is still under warranty). I figured that if anything happened to the new battery, I didn't want Rad claiming that any warranty I had on it was void because I was carrying it around without it being mounted to a Rad approved/supplied thingy. So much for that idea. I asked about the cable/connector after seeing the first post in this thread, just to have as a spare, another delusion on my part.