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And assuming you have a 625 amp charging supply, keeping a good contact is the problem. You certainly couldn't use a plug in connector. If you have a resistance in the wiring/switching/connectors of 0.01 of an ohm (100th of an ohm), the heat developed at that resistance, at 625 amps, is 3.9Kw. I worked on high current circuits and we used OFHC copper (Oxeygen Free High Conductivity), and it was a nightmare to keep connectors clean, tight and not overheating. That's why mercury switches are used in high current industrial switching.
We were operating at 1000 Amps, and the copper cables were as thick as your wrist.
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