I'm trying to rewrite (because converting didn't work so well) a dashboard I'd written in simple xml to dashboard studio that heavily relies on search base. Whenever I try to create a map viz object in studio, it only prompts me with the option to create a new data source. However, I've already setup a search base and built multiple search chains off of it. I'd like to reference the search chain to feed the visualization but I haven't been able to successfully do this. Any ideas on how to approach it?