First, keep in mind, when using a corner unit, it must be next to a 16” deep closet tower on the side of the corner unit where the shelves are attached. For closet towers that are adjacent to the “floating shelf” side of the corner unit, either the 16” or the 25” components (without drawers or doors) are compatible.
Also remember that it is required to level and anchor the side cabinet prior to installing the corner unit.
See this video for more information.