Hi, I'm not sure if you are aware that the Euphrates arrived 25th MAY 1852 not March as Ancestry has. If you look at the top of the original document the month is MAY. Also the site mariners and ships in Australian waters has it as MAY. After the girls arrived in Sydney they walked from the ship to Hyde Park Barracks which was being used as a female immigrant depot. See article in the Empire newspaper 28/05/1852. Apparently there was no chaperone and the girls were subjected to unseemly remarks. At the barracks they would have been interviewed by prospective employers and employed. Most would have married not long after. I dont know of any records for employment in existance maybe at State Records at Kingswood NSW.
The SMH 31/05/1852 has an article by Charles Dickens who visited the Euphrates before it left London.
Chris