Having I think a bad ground problem
 

I’m having a problem as though where my 2005 Chrysler 300c won’t Run I’ll get a slow crank then nothing my engine wire harness heats up when trying to jump start it I changed my starter after and it still does the same thing it’s to the point if I put a jump box on the battery it won’t jump because it pops up as a bad ground some piece crap mechanic cut a wire and did some bull but i realized he didn’t know what he was doing so I got it back I was wondering if it could have something todo with me previously getting my transmission changed can someone help I know the wire that was on the engine harness that heated up was black and red
https://cimg6.ibsrv.net/gimg/www.chr...15f62555d.jpeg
https://cimg3.ibsrv.net/gimg/www.chr...5e8d058a8.jpeg
https://cimg6.ibsrv.net/gimg/www.chr...af7cbcabe.jpeg

trace all the grounds to the engine then clean and not rusty is what you want.

I wanted to show the video of the grounds I found how do I do that