I did just look at them on McMaster, they make ones rated up to 350A, assuming peak.
The quality of the connection is what worries me. I feel that welding cables have a much better connection than these plugs...
Do whatever you want, it's your rig.
I'd rather be safe than sorry.
2003 gmc 1500hd quadrasteer "Miley"
2000 jeep cherokee "Herman"
1977 Ranger 150a bass boat
1987 Yamaha Moto 4 quad