score:17
Here's a link to an official PDF showing the DS-160 interactive application: https://travel.state.gov/content/dam/visas/PDF-other/DS-160-Example_11-19-2020.pdf
On its ninth page, you can see that there is a question "Have you made specific travel plans?" Answer "no" to that question. The parts of the form asking for details of the travel plans should disappear.
It will nonetheless ask for a date of arrival. The instructions in the right margin say "if you are unsure of your travel plans, please provide an estimate" (see page 11 of the pdf).