In the girls management screen you can see the girls that are assigned to that Location.
The management screen displays each girl's health, happiness, tiredness, and the Jobs assigned. If health is too low, the girl will die. If tiredness is too high, she will always refuse to work. If happiness is too low, she will refuse to work, and may kill herself. And if her rebelliousness is too high, she may decide not to work.
At the bottom of the screen, you can assign Jobs for the day and night shifts. On the right, you can view more details about your girls, transfer them to another Location, free or sell a Slave, or fire a Free girl.