Had a “duhhhh” moment earlier when I posted.

For others looking for the Ethernet manual: it is available on the Humminbird web site under any of the Ethernet accessories like the AS-EC10E cable:
AS EC 10E
Look under the “SUPPORT” tab located at the right side of the page under the description and price. Once selected you should be able to download the manual from the “Download Product Manual” text.

Not sure if this direct link will work or not:
http://store.humminbird.com/media/do...net_Manual.pdf