Create Locator - Field Map to District

[JoshBillings]

Hello,

I am creating a Point Address locator and am trying to figure out how I can field map the District field that shows in the Find Address Candidates option in the Geocode Service (see below). I've tried via ArcGIS Pro application (District doesn't show up) and also python (says District is invalid). I've also tried to add a custom output field and it says "Custom output field name 'District' should not be equal to one of the locator output field names."

Is this possible?

Thanks,
Josh