@JoeD - Thanks, It was easier for me to have all the breakers on the right side so that's where I installed them. Using up the six even breakers, 2, 4, 6, 8, 10, 12. After I installed them, it made me wonder if It was a requirement that they are evenly spaced on the hot lines coming in but I had already cut the cables to length. So I crossed my fingers and asked the question.
@wuzzat - I agree, I got the 6 breakers I installed labeled along with the wire coming out of the panel labeled.