It is really important after a C-section to start working that abdominal scar to optimize healing. The sooner you can begin with some release through self-massage, the better and this video is a very helpful resource to show you how to do just that. Scars of any kind can hold a lot of trauma neurologically, which in turn can affect motor control and muscle recruitment (caesareans in themselves can bring about a diastasis recti, more about that can be found here).
This is also something we can work on together in clinic here, if you would like some support with it.