Looking at two examples in QuickSheet: Citing Ancestry Databases & Images:
For the "City Directories: Images" example, waypoints to the image are given in the citation.
For the "Draft Registrations: Images" example, search terms are given to find the record/image ("imaged card for Clovis Julian, no. 120, New Orleans Draft Board 13"). I looked this up at Ancestry and found the waypoints to this image to be Louisiana > New Orleans City > 13 > Draft Card J > image 393 of 425.
Is there any preference or rationale of choosing to list the waypoints or to instead list the search terms to find the item of interest?