Dynamic Mapping - Custom Dropdown

Hi community!

I am stuck currently. I currently have a dynamic mapping that has correct column names on the left side. But for the dropdowns next to it, it is grabbing the current boards item columns. And I would rather it grab my own custom list of column names.

I looked into remote options url and creating a field type of list, but I dont think it is working for me. Or rather I am not using it correctly?

Any solutions to this would be helpful.

Thanks!!

Field Configuration

Field Name Dropdown Menu
Name :open_file_folder: Select Column
Status :open_file_folder: Select Column
Date :open_file_folder: Select Column

Note: The dropdown menus will only display item column names rather than a predefined custom list that I created.