Anderson plugs are used commercially in electric forklifts and they pass the field tests all the time, so hard to beat the design.
Few tips how to deal with cables as the big crimping tool is not easy to get.
I did solder some heavy cable using propane torch from plumbing jobs.
Remove the metal prong from the plastic, put it in the vise, or vise grip with hole facing the sky, put some cut solder inside with flux and then warm up with the torch, while sticking cable in it. You will feel when the solder melts and the cable goes down. Make couple of turns for the solder to melt around.
Another way I used them - having cables with done ends with ring connector, I removed the prong from the plastic housing, hammer the sleeve end flat, drill a hole in it and used very short bolt to bolt cable to the prong. With some grinding the bolted connector will fit back into plastic housing.
