To add to Matthew's suggestion, if you go the route of browsing all the images of the year of the census you are looking for, you will find all the details (City, Ward, ED, Election District, and page number under the details of the Ancestry image. That will speed up the process.
Once you locate the image on FamilySearch, at the bottom will be list of the names indexed. You can scroll until you get to the name you are looking for and to the left will be an icon by which you can attach it to the Family Search person's profile.