Most single tank regulators are fitted like yours with similar fittings to what you see. Some dual tank automatic regulators use different size fittings.
If you're going to retrofit the entire single tank system to a dual automatic regulator system, you might find it cheaper to just buy the entire kit.
Here's one example:
https://www.amazon.com/Flame-King-KT...gateway&sr=8-1 There are better quality systems, but depending on what you want to pay, if you buy a $40 regulator, this is about the same quality as you'd get with that and the pigtails "come free".