Bringing the cables in at the top is the cheapest way to do this. If the bundles are too large for the space, perhaps bringing them in at the top left, top right, and halfway down on the left and right can relieve the bundle size and make this work.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
