It came with 2 half moon clamps for the wire, and the instructions say for wall mounting, put the clamp on the bottom knockout. For floor mounting, use the knockout on the back.
This would mean that I would have to come out of the sheetrock with the wire, then turn up 90 deg to the outlet. Is this right? Is there any reason why i cant use the rear knockout so I can come inside the sheetrock and through the rear knockout?