How do I add a subgraph to an existing project?

I am trying to participate in the Unlock your Creativity challenge but the rules require that you include a subgraph from MicroJam. I had built my scoreboard without the MicroJam subgraph, but that wouldn’t be eligible per the rules. I cannot find ANYWAY to import the .zip.

I unzipped it and saved all the files in the project folder on my computer. But within Effect House I can’t find an option to import and the “add assets” doesn’t allow me to select the subgraph.

The only thing I have been able to add is the number graphics as assets to be used in the subgraph.

I am so lost. Any tips on adding in a subgraph is appreciated. Bonus points if the steps meet the Challenge requirements.