[Healeys] Hooking up the ground

[Chris Scholz]

Here is a silly question. 

I have my 100-6 back from painting and I am hooking up the wiring.  I lost the picture of the battery cables from before restoration. My car is wired with a negative ground. 

I am buying 4 gauge to go from the positive to the starter. (About 10' in length-copper has gotten pricey!).  Where does everyone connect the ground too?  Some Healeys here that are not stock had the ground connected to a bolt on the rear bumper brackets where it bolts to the frame. Is this correct?  Not sure what is correct when stock.  Thanks. 

Sent from my iPhone
Chris Scholz OD