Using Parameters With DataReader Source

Hello,
I have a DataReader souce configured to an ADO.NET connection manager that uses a .NET ODBC Data Provider. The DSN configured in the connection manager uses the IBM DB2 ODBC Driver.

I have a package variable, the value of which I want to use in the WHERE clause of the query contained in the Data Reader source. The query is as follows:

SELECT
T1."IRK_ACCT_CD",
T1."IRK_COMPANY_NBR",
T1."IRK_ACCT_NAME",
T1."IRK_ADDRESS_1",
T1."IRK_ADDRESS_2",
T1."IRK_ADDRESS_3",
T1."IRK_STATE_CD",
T1."IRK_POSTAL_CD",
T1."IRK_AR_TYPE",
T2."RK502_ITEM_RE_NO",
T2."RK502_TRANS_CD",
T2."RK502_TRANS_TYPE",
T2."RK502_ITEM_AMT",
T2."RK502_ITEM_DT",
T2."RK502_PURCH_ORD_NO",
T2."RK502_GL_EFF"
FROM "CBDBOW"."IRK_RECORD" T1, "CBDBOW"."RK502_OPEN_ITEMS" T2
WHERE
T1."IRK_COMPANY_NBR" = T2."RK502_COMP_NO"
AND
T1."IRK_ACCT_NUMBER" = T2."RK502_ACCT_NO"
AND
T2."RK502_ITEM_DT" < ?

I'm not very sure as to how to map the package variable this way. I think for ODBC parameters, I need to represent the parameter with a question mark.

What else do I need to do to set this up?

Thank you for your help!

cdun2