Secs/gem sample project question

I am playing with the secs/gem sample project. I am trying to add my own secs gem command to the dropdown and send. So far I have I have added it to the treeview and the send bar on top. But no luck adding it to the search bar shown here :


I tried adding another container to GUI, but the container keeps getting created outside of the tree. And I am not sure what is going one with that GUI top container. Additionally, without adding the new command to the search & Display window, when I send the custom secs/gem command, I get a timeout error. Is there by any chance a more in-depth tutorial that explains the secs/gem sample project or maybe a simpler one? Using the SECS/GEM Module | Ignition User Manual