Engine strap
But the OP thought that was a "ground strap", because ChatGPT told him it was.
I tried to tell OP it has nothing to do with any grounds, and showed him where the main grounds attach on Softails. The part I showed him is forward, and under the front of the seat where several grounds attach.
I only suggested that maybe ChatGPT mixed them up, because ChatGPT was dead wrong calling it a ground plate, and those two pieces kinda look alike. But in reality I have no idea what ChatGPT is "thinking".
I hope the OP found the issue causing his battery terminal to glow red, but ChatGPT put him on the wrong trail .....






