Melted ground wire

I have update. Looks like my starter wire was shorting out on my center link. One of two thing happened and I’ll have to further investigate when it’s little warmer.
center link was always rubbing wire, finally wore hole thru casing and shorted it out
or that fancy McRobb starter which is clockable rotated it self (clunk I heard when starting before ground melting problem) because I never torqued it properly to hit center link. Finally put 2 and 2 together when started after work today and ran fine for 10 min, then I went to straiten wheels and I stalled out. Same thing last night when I pulled out I have to steer around another car and it conked out and wire began to melt.

thanks everyone for the help,looks like I have some cable replacing?/rerouting to do. Still not sure what’s going on with my multimeter. on the battery with car running my 2 other barracuda read same number in 200 and in 20 setting but this 72 reads normal in 20 but it’s all over the place in 200 setting. I snapped some photos, seeing numbers up 60s. Notice the setting on multimeter