Everyone likes a mystery, Right? Jumper cables acted like the wires were crossed

[The guitar zombie]

thanks, suggestions of an electrical problem seemed right on. The loose wire probably killed the starter.
SOLVED. Maybe. I took the starter out and noticed the electrical lead’s screw was loose. See video in a few minutes (Have to attach via youtube)Black around nut indicating arcing. Why did I say mabe? I will install a new starter soon.