Answer: When installing the module, first align the edges with the adjacent LED module(s) and then carefully install the module onto the cabinet. If the edges are raised, lightly tap the edges of the module with your palm to make it fit.
Note: Do NOT tap the LED Modules hard. If they are not going in after being lightly tapped, refer to this link.
Watch for Instructional Video: "ViewSonic How-to | How to De-install/Install LED Modules"