Well...My kit doesn\'t said that, calling NVC is your best bet.
I am very sure that DS-230 Part-II is for the interview.
603-334-0700
Here are the options that you could use...
2,2,3,2(NVCCase#) and the follow the further instructions after that.
Suggestion: Please post these ? under the following thread for the better response to any ?.
140-->NVC-->St.Louis-->NVC-->Consulate Tracker Part5.
I can always help you as well.