The Zoom AM3517 eXperimenter Kit Product Change Notification document has been updated with the addition of PCN 618: "Changes to SDK-AM3517-10-256512R-C". This PCN describes a change to the eXperimenter kit baseboard assembly component population that removes the S-Video connector.
You can download this document from the AM3517 SOM-M2 (eXperimenter Kit) product page on Logic PD's support site.