Angular reinforcement for BESTÅ cabinet

I have an IKEA BESTÅ cabinet in my living room. The purpose of the cabinet is to hide all the cables of the TV, decoders, and game consoles, and to store network switches and routers. However, the only issue is that the rear panel of the cabinet must be removed, and as a result, the structure becomes unstable and bends immediately. I designed this angular support to be fixed to the wall and the side panels. The bracket makes the cabinet robust enough to support the weight of the object placed on the top plane, and keeps it steady avoiding any kind of bending. Note: The angular support can obviously be used with any kind of cabinet and furniture. I recommend placing the piece on the bed as in the picture and printing with at least 3 walls and cubic/gyroid 30% infill.