Radbox Radius Attributes via SQL Statement?

Ok I figured it out, and for someone else who has this problem:

On the "Authorization" tab in the list of responses: When adding an attribute from an SQL query, the first selected variable from the query is an attribute, and the second is a value.

ex.

SELECT 'attribute', value FROM table WHERE username ='$u'

For a more specific example:

SELECT 'Ascend-Data-Rate', hsbrate.rate FROM hsbrate, customer WHERE customer.id = hsbrate.id AND username='$u'

This statement will basically pass the following:
Ascend-Data-Rate = 1024000

(assumes 1024000 is the speed value stored in the database)

NOTE: $ u is a friendly variable in Radbox Radius that denotes the authentication of the current user.