I don't use Ancestry, so I can't be sure, but it seems like someone looking at your profile should be able to figure out how to find you on Ancestry. There isn't any kind of automatic 'connection'. The information you enter will automatically display (within 24 hours) on all profiles related to you within the range where you might have matches. Someone looking at those profiles can then decide to see if they have auDNA segments matching yours. Have you uploaded your DNA to GEDMatch.com yet? That will allow you to compare to people who have tested at FTDNA and 23 and Me as well. It will also allow you to do triangulation, if necessary for relationships further back than third cousin. Once you have it, be sure to enter your GEDMatch ID on your DNA test page as well.