To stick sprinkles to the side of a fondant cake, you can use a light coating of piping gel or edible glue applied with a brush where you want the sprinkles to adhere. Work in small sections to ensure the gel doesn't dry out. Gently press the sprinkles onto the cake using your hands or a piece of wax paper to avoid smudging the fondant. This method should help achieve the look you're aiming for without compromising the appearance of your fondant-covered Baddiehub.
