When mounting on a wall, pick a sturdy mounting point. You can install on the ground or prop the receptacle up a couple of inches above ground and level. Once in place, make sure it is level, plum and use a pencil to make small marks where it will be mounted and mark hole centers. Remove from wall. Use appropriate concrete anchor size that will be slightly smaller than the holes; for drywall use appropriate drywall anchors and screws. Wood use #8 – 10 x 1” wood screws. Make sure when installing to re-install garbage can and check that it is level, then finish installing anchors and hang the receptacle back on the wall.