How do I replace the three portfolio images under slider with projects

Hi, I am trying to replace the three images under the portfolio slider on the home page (Portfolio theme) with 3 of the same size images but just projects. I’m not seeing the projects as an element to add. Is there a way to do this? Thanks! My website is http://www.traviserickson.com And actually these three images are down a little further under the free home evaluation box under the slider.

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