Factory location for the negative battery cable?

[71CHEVYSHORTBED402]

One of the bonuses to a full restoration and having a driver of the same sort is reusable parts. The driver is having intermittent starting issues. Though relatively new to barely used, so happens the starter, battery, cables, spark wires etc. won't be reinstalled on the project. Works out rather well.

Less perhaps the old battery, at a glance the primary issue is the negative cable is thrashed where it's grounded, which brings me to.........

What was the factory location(s) for the negative cable connection? See the first image for where it's connected on the driver. If I had to bet it's wrong. For whatever it's worth (probably nothing), this had a factory aux. battery.

The project has A/C as well, but the cable was connected to the top of the frame, also pictured.

Thank you..