Do you have a pair? Females have red bellies. They will most probably spawn without much intervention, but the dempsedy and rd might end up eating the eggs/fry.
Yeah, females have pinkish/yellowish bellies. If they pair up, it should be extremely easy to breed them. I have a similar setup and the convicts have mated in several spots in the tank. They just need a good surface on the inside of a cave like structure. I personally use two pieces of slate leaning against each other.