This option will be available when new payout system go live - which should happen next month I think.
Also selecting USD account you should select “Inside US” details.
I raised this question in our “New Elements payment system questions” topic and KingDog gave me straight answer, I quote:
"Some more details from the payment provider:
Where the Author has selected Bank Country = USA on the screen they add their bank info…
USD - If you selected United States as the bank country, then add the “Local” USD/US bank account details. So we can send the payment as a local USD ACH within the US domestic payment system.
GBP - If you reside in the UK, and selected United Kingdom as your profile country, then add the “Local” GBP/UK bank account details. So we can send the payment as a local GBP (FPS) payment within the UK domestic FPS payment system.
EUR - If you reside in a Eurozone country, and selected a country that is in the Eurozone as your profile country, then add the “Local” EUR bank account details. So we can send the payment as a local EURO (SEPA) payment within the EURO SEPA payment system."