I know there is a template, but I do not use the template anymore for this very reason. I just copy and paste the source citation at the end of the memorial page and add the link to the actual memorial page to the citation where it gives the memorial number.
An example would be as follows:
* <i>Find A Grave</i>, database and images (https://www.findagrave.com : accessed 30 May 2018), memorial page for Stephen Howell (1763–17 Aug 1838), [https://www.findagrave.com/memorial/48780273 Find A Grave Memorial no. 48,780,273], citing Howell Cemetery, Shelbyville, Shelby County, Kentucky, USA ; Maintained by Lynn Fischer (contributor 47245698) .