The Location Maps feature is mainly to put adjacent jobs or multiple visits to the same location in one place. It only works with georeferenced maps since we need to know where they are and Stitch Only jobs don't have this information.
There is little documentation on it but basically you just pick what basemaps you want to show and which of your own creations to add. You can adjust the ordering by moving the orange (your maps) or gray (basemaps) up or down in the list. Just be sure to hit update to see your results.