Funny how a few spare pieces of wood trim and really finish off a project. Trimmed out the top and bottom of the rack, then spray painted it to match the Ethernet cords.
Side movement is completely fine thing doesn't budge. I built two identical picture frames 1st when I was building it. then attached the front and back together with 2x4's at the top and bottom. Could always add side support if needed but as of right now doesn't seem like it needs it. After I put it together as a test I sat on it and the thing didn't move. The rack doesn't wiggle or move at all.