If you want to set the slider on the front page, go Appearance > Widgets. Find the widget Zurbox Slide Image and put it in the area Frontpage Slider. Configure the widget (enter your content). Repeat the procedure one or two times (set one or two widgets that as the sliders).

slider-front-page

When you do this then you can proceed to configure the visibility and order of this area, go Appearance > Customize > Front Page Order: check the box Slider and move when needed.

slider-front-customize