The reason why the hidden slide is called the hidden slide is because the drawer is pulled out and the slide is not visible. The side panel has a mounting hole installed on the side of the cabinet, the sliding rail is installed at the bottom of the drawer, so that the drawer can not be seen, but if there is no such hidden sliding rail installed, it will often have problems in the installation, so it is best to find a professional person to install, you can refer to our installation drawings