Yes, more or less, the last part is like a greetings to your family there (You, Your Wife, Your Father in Laws)

"Urang banjar sakalinya bini wan mintuha pian lah. Salam haja gasan sanak kaluarga." is more like this "Oh, just found out that your wife and in-laws are Banjarese. Please, send my greetings for your family" 🙂