I have 9-15amp receptacles on a circuit tied in the panel w/15amp breaker(12.27amp total) I would like to add a 10th that would still be under the load limit. Question is.. Would like to add one behind my flat panel to conceal, can I cut in between 2 receptacles and run my 12-2 straight up to my new box. Not into lectro lingo yet, hope this is understandable. Thanks, Mike