I know how to send .txt files in OCPv4 using the 'social media' part in my Autotrack Pro clocks.  How do I attach images to this or do I have to reference from an https/http address as a link somehow?  Couldn't find this info in the guide so far my facebook social media links in Autotrack are:-

OCP_SPECIAL_CURRENTDATETIME - <textlink.txt>

These also work for twitter but would like to post images as well.  Please advise the code or link details that I'd need to put in.