Over-The-Toilet Cabinet Installation Instructions Tools & Materials Step 1 Hold the cabinet up above the toilet until it’s positioned where it fits best. Use the tape measure to center the cabinet above the toilet tank. Mark the cabinet’s position with a pencil on the top and bottom of the unit. Leave plenty of room to remove the toilet tank lid. Step 2 Use the stud finder to locate the studs and mark the stud location on the wall.
