I was just looking all over for the NewCustomer_c value too; thought it should be in XaSyst or XbSyst, but it was not. Turns out, originally they put the codes in UDCodes, so I think that is a whole different ballgame. Maybe that is where your NewRoute_c value should be placed as well, I really do not know. I would have liked to have found it and converted a form customization to a method directive.
They’re likely going in there, hidden, rightfully so…