I have a DC to DC, 12 to 48 volt 10 amp converter that I would like to feed from a 12-volt battery in my car (engine running). What is the gauge of the cable I should use to feed that converter from the battery? It will be drawing 40 amps. The converter will feed the input of an Ecoflow Delta @480 watts. Before I send the 14 gauge cable I (mistakenly?) ordered back to Amazon which I suspect is too thin, should I use at least a 10 gauge cable? The length of this cable from the battery to the converter will be less than 6'. Here is a link to what I think answered my question, but I would appreciate confirmation: