As an old cable puller from way back, my boss used to always say, why thread that needle twice.

unless you are the VERY FIRST one to pull an add on, ddisconnect someone elses and use it as a pull cord for yours.

But that brings a new question to mind.
lets say I fish a new 12/2 romex wire through the wall from the attic. and connect it into the pannel board.

did I just violate the wire securing rule of 12" from the pannel board.??? posibliy the 4.5 ft rule????

good questions, any inspectors out there???