Might be easiest to buy a NATO end for the cable you already have. Not cheap, but looks like you can get one for under $100 on ebay.
Do that and a couple of Anderson style SB350 or maybe just the SB175 as you're talking smaller loads (not sure what gauge your cable is) to make one end swappable from 2 pin to NATO as needed.
I did the reverse and used the Anderson connector to put a 2 pin onto my NATO cord. Then I had a lighter duty cord ( 0ga instead of 2/0 ) with the SB175 and an adapter from the SB350 to SB175 so my total cable length is about 40 feet, but I only have the HMMWV and some generators, so not like I will be maxing out the amperage.
View attachment 852622
and ebay link for a nato cable end, about $90 shipped.
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