Adding slides using list module does not allow association with content element

[ToddHossack]

Users on my site are adding flexslider images using the List module and "Images" table. However, when doing that, the slides are not associated with a content element (ie. the content_uid field gets set to 0). Thus, the slides do not show up. Is there a way for editors to link the image record to a content element, eg through a dropdown? Alternatively, would there be some Typoscript that could be used in the page template which would set the content_uid to a certain value (perhaps assuming there is only one slider on a page)?
Thanks.