the best way to link your hubs is using the same keywords if you would like to link these. hub pages is a little bit different than most article writing sites.
you can link these articles two wonderful ways that hub pages provides through building your hubs.
use the "show links" in building your hub page. add a link from one hub to another. you can even link more than one hub.
use the "add links" button after you have published. words are highlighted that you can link to other hubs. if you are using the same seo words, highlight these keywords yourself and your own articles should appear to allow you to link to your own articles
one more way to "link: like articles together is to develop your own hub niches and have all of the same hubs categorized together.
hope this helps.