I am beginning the process of replacing our SharePoint Lists with SQL Databases. I have a Form where employees submit vacation requests that I want to start logging in SQL. I have a connection setup to our on-premises SQL Server already. Here is the structure of the database:

I see that Execute a SQL query (V2) is not supported by on-premises, so I was using Insert row (V2) which seems to be supported. The problem, is the Insert row (V2) is not showing any of the columns that are within the database.

What am I missing?