I was able to fit my entire hand from the passenger compartment into the trunk, so I would have to guess that your cable will fit if you use the holes found on the SIDE of the rear seats.

I ran cables along the door sill molding then behind the "wing" part of the rear driver side seat. You will find access to the trunk area after you remove the forward most trunk trim (the carpet stuff). The port is toward the outside of the car and is quite large.

Be mindful that the wing portions appear to have some sort of frame that allows them to adjust to fit body variations so you may have to press it back against the trim once you are done running your cables.

Thanks!
--Larry