Yes, day and night shades can be top mounted to the underside of a cabinet. The typical installation involves mounting the valance and side trim rails first, then installing the shade inside the valance for a clean and functional setup. It is important to measure the cabinet space carefully to ensure the shades will fit without obstruction. This mounting method is commonly used and provides a neat appearance while allowing smooth operation of the shades. If you want to closely match your existing setup, make sure to provide any specific details or measurements when ordering to ensure compatibility.