^ solid side panel version
^ TG side panel version
The reason I brought both into the thread, is to bring your attention to the way the panels are mounted to the case. In the TG version there are pegs in the side of the case, where the TG panel mounts to. On the solid side panel version the side does not have pegs for the TG panel to go on. To add, there are no spare/replacement parts for the Meshify C whereby you can add a TG panel. It either comes in TG flavor or solid, not interchangeable.
You're going to have to return the case and repurchase the TG variant.