Finsweet CMS Sort + CMS Combine, via definded number

Using @Finsweet CMS Sort + CMS Combine, how do I sort by a Sort Order (such as predefined numbers set in CMS) as opposed to sort by name like this example?
Basically, I’ll have a page with x2 CMS Collections on, and I want to be able to control how they ‘mix’ via a sort number given to each Collection Item? Hope that makes sense?!

Here is my public share link: Webflow - Neil's Superb Site
(how to access public share link)