Just to clarify, we can add the fact that we've taken a particular DNA test to our profiles here, but we don't upload the actual DNA test results here. Living individuals must enter their own DNA test info on their own WikiTree profile. I'm assuming that the profile to which you linked is your wife's profile. If so, she is already a Family Member here.
To enter her DNA test info, she can use the Add drop-down menu to choose the DNA Test Information option. Under "Add New Test Information", she can "Click here to select DNA test" and choose the appropriate DNA test. Then she can add any desired optional information and click the Save Test button to save the DNA test info.
Within about 24 hours, the DNA test info will propagate to the profiles of her appropriate relatives based on the test type and the existing relationships.