no prob at all, the grommet can be a huge pain just be patient and it should go in without to much trouble. in the picture i still have the white wire soldered to the terminal (that was removed), glad to see someone else changing out their power wire(s). It's cheap insurance and fairly easy, gives you a chance to clean up under the iso brick.
(funny 3 out of 7 midway iso's i've done have been missing one of the screws that hold in the line filter).