At the bottom of your mtDNA matches page (at FTDNA) click on the link to upload your mtDNA results to MitoSearch. Then enter your MitoSearch ID, FTDNA kit number, and haplogroup on your DNA tests page in Wikitree.
You and your direct maternal line ancestry needs to connect to Marie's direct maternal line. Your privacy level needs to be at least "Private with Public Family Tree." Within 24 hours your mtDNA information will be automatically associated with your direct maternal line.