I can't speak for the ECE course, but I think you might mean CS 6F03 (Distributed Computer Systems) and CS/SE 6DB3 (Databases), not 6EB3 and 6CD3. Perhaps those are old course codes?
My general approach for finding info on graduate courses is go to the department page (eg
http://www.cas.mcmaster.ca/cas/), click Graduate in the left hand menu, and then click courses. That will give you links to, if not the actual course website, at least the instructor's website.
If all else fails, google the course code. You should be able to find some old course websites that way.
Here's last years website for 6F03:
http://www.cas.mcmaster.ca/~nedialk/COURSES/4f03/. I'm not sure if you'll be able to find one for 6DB3, as the old instructor (Dr. Franek) seems to have taken down the site from when I took the course, and the new instructor hasn't created a site yet.