Hey Bert B! I am a fellow african cichlid fan. Here is a picture of the rockwork in my 90 gallon cichlid tank (I've since upgraded to a 125 gallon tank, but the gist is the same):
Above and beyond the rockwork, you can also use fake plants to help break up sight lines so that one fish cannot see all the way across your tank. The same can be done with rocks and I'm even using driftwood for the same purpose in my new tank.
(Sorry so fuzzy. I stole the still picture from a video)