Board Thread:Help/@comment-26182374-20170704134358

So I wanted to use the slider template on a wiki I regularly edit on, and I wanted to follow the same format as this wiki's slider. However, I don't understand what all these #portal_contents are on Template:Slider (on the PortalSlider body, such as, etc.). Can I just copy the source code or is there some info I need to know about these things in order to customize the slider? 