I would like to place my tv in between two outlets on my wall. The TV will be far enough from either outlet that I would need to run an extension cord which doesn't seem like a good permanent solution. To bring power where I need it, I would like to add an outlet between the existing two.
These outlets are on a finished, exterior wall (with the existing outlets and proposed new outlet on the inside). They are 12/3 Romex (best guess on gauge) and the outlets are all half switched. I believe that the two outlets I would like to add the new outlet between are in sequence on the circuit though I'm not sure how to confirm this before cutting the wall.
My plan was to cut the hole in the drywall for my new box and outlet and split the romex there for my new outlet. However, if I cut the romex there, it probably doesn't have enough slack to wire the new outlet and remain connected to the two existing outlets.
So what is the best way for me to add a new outlet in the desired location? I've seen plenty of tutorials on adding an outlet at the end of a sequence or off of one existing outlet but I haven't been able to find information on my scenario.
EDIT - Additional information:
The walls have a mud swirl finish that will be nearly impossible to match (as far as I know). Because of this, I'd really like to just add a box.
I do have attic access. Would it be better to run from the first outlet up to the attic and over and down for the new outlet and to reconnect the existing outlet?