I did see the part that said "Not all models will have terminating resistors. In cases where there is no termination, an in-line terminator will be required" but still couldn't locate where adding my own terminator would go. None of the holes I saw looked right to me, but I concede I don't really know what I'm looking for.
Hopefully the photos will help. I created an album called IBM WDS L80 HD here: https://groups.yahoo.com/neo/groups/emax/photos/albums/428384323
Thanks again for your assistance,
Jim