First, you will recieve an email with a subject line starting with "Next step in your application"
In this email, you will find a link to select your timeslot:
When you click the link, you will be brought to a page link this:
The availabel dates are highlighted. Click one, and the available. timeslots will open up on the right.
Click the timeslot to selct your time, and then confirm:
Your interview is now scheduled, and you will recieve a confirmation email.