I don't know where it is. But I actually DID the mod to my Graphite about a year before it was lost. I grounded the small cable to the chassis (where the factory cable fastened) and the heavy cable went to the block. I THINK I used the alternator mounting bolt, but I just cant remember.

Again, I never found the block to chassis jumper, but I know one guy on Facebook DID when his corroded in two!