the visible screws on the sink are all that hold the sink in place. Look inside where the sink pivots, there are a few screws there. When you pull the sink assembly out you will have to disconnect the hot and cold water and the drain, all easy to do. When you remove the sink there is a large piece of plywood that Nucamp installed and to which the sink was screwed. I attached the new plywood panel to that wood but used some 3/4 inch square dowels to push the new plywood panel out a little. The screws that hold the towel rod bracket in place are also the screws that hold the plywood panel in place. I hope that helps. I don't have a picture of the installation of the 3/4 inch wood.