Enterprise Gateway with ODBC

Hello,

I have an ODBC source that I use for several Dashboards. I would like to setup a Gateway in order to keep the data up to date. The source is an IBM DB2 database. (I know that connecting straight to the database would be better than ODBC, but ODBC is my only option)

I am wondering how I set this refesh up. I see the gateway setup prompts for a connection string and I am not sure what I need to include there to make the connection. I have a DSN fully configured on my computer's ODBC Data Source Administrator, but not sure how to format this into a connection string.

Any guidance would be appreciated.