just edit your hubs,
or if you were building a new hub ,
just see the capsules at the upper right corner (below the main headings with black background ),
click twice on amazon capsule ,
scroll down the page to the end ,
click edit on amazon capsule ,
choose if you want to display only specific products or click on choose keywords ,
when you specify keywords ,
preview results so that you can see what type of results will came ,
then save the capsule ,
now you can move the capsule to any of your targeted place ,with the arrows present on the capsule.
if you want more help ,
just click on help button on upper right corner ,
then search by entering the word " amazon set up" in the search box ,
or you can scroll down to to see amazon.