You can also buy a brass bolt 5/16 x 3.5" long, cut the head off and build your own stud.
You can find the US brass bolts in the specialty bolt & nut section at Lowes.
You will also need 4 brass nuts and a some washers, refer to the picture below.
Wrap a few turns of electric tape (about 1 inch long) in the exposed threads that go inside the OBC (no shown in the picture below) to prevent any abrasive wear.
You don't want the assembly tight around the OBC, just snug or even a little loose is fine as long as the cable lugs are firmly tight between the two nuts in each side.
