In Maestro 17.10, Card Content and Card Selector are available in the palette but I could not find any documentation on these two components. The only KB article I could find is related to 18.05, link: Card Content Template.
I was actually in a process of writing a blog about it as I have used this feature heavily but since you asked, the Card Content Template combines the functionality of both the Card Selector and Card Content components. Cards basically provides a better UI over repeating elements design but the technology is still the same. If you do not want to use Card Content Template for any reason, you can build your own design using individual Card Content and Card Selector components. In order to use them effectively,
As I mentioned, I will work with KB team to add a proper documentation for this feature.
Thanks Nirmal Solanki, I will try this out.