After sending my starter back to Powermaster, speaking with their tech and the reading the Powermaster istallation manual, I decided to upgrade my battery cables.

The powermaster tech said my old starter had taken low voltage hits. The manual says if the run is 10+ feet the cable should be 2/0. And the hot starts that seem like a dead battery.
Obviously the old cable on the right. It looks like 2AWG
The new red cable is 2/0

The run from the trunk battery is 11 feet so I order some 2/0 cable and fittings to get the project going.