3406e Ground Issue Will kick over Just Won’t Start?

Hello Again… wording may be a little messy writing this crap on my crappy iPhone!

Ok so I already know the problem just wanting a second opinion. So recently been having some starting issues ole girl will kick over but won’t start my volt was going down under 1400 and smoke/steam coming from the ground wire on the frame. Blown the ground wire today that hooks too the starter most likely cause from overheating/overcharging. I’m 100% my alternator is draining my battery’s and took a sht today. In a few months or a year I’m gonna change all my ground wires on my engine/frame so the old ones won’t fry on me later down the line.

FYI: Don’t have any video of my issue wish I did but currently not at the moment sorry.

 

May be a dumb question, but is there a diagram of the head ground wire located???

 

https://imgur.com/a/Zjs0l1i
Pretty this is it not 100% sure can’t find a diagram I’ll keep lookin though

 

Anyone now if there is a replacement for a 30 awg head ground wire that hooks to the starter??? Mines got overcharged