Button mapping / binding c208 G1000


I’m building a button box for the caravan primary switch panel. I can’t seem to figure how to map SET STARTER TO MOTOR, although it clearly exists in the software somewhere. Frustrating as it’s in the emergency procedures. Is there a tool for this?

As a complete aside - there’s no fix for the lack of RNAV’s or a usable Direct To function yet is there? (pretty sure that’s a no)