For anyone curious a shot of the new ground strap ($48) is below. I cleaned the mounting positions for good measure even though they were in good shape and spread a very light coating of dielectric grease on them. With only the new strap in place the original starter was able to turn over. Regardless I installed the reman Bosch unit and buttoned it all up given I'm just shy of 100k miles it was good insurance.
The left side is what connects up at the engine mount and the right connects down below to the frame.
