Need Help Wiring speaker wire??

Can any of you guys help me. I have a 1985 v-20 cc. I am trying to install cd player and speakers. I went with the self enclosed gimble mounted cd player on top of cc. I am having trouble running the wire through the boat. I am going to use the access hole covers in front of the boat and the two in the transom for the speakers. I can run my steel wire fish from the rear acess holes to the front. I cannot seem to get from the rear battery area to the center console area.

Any ideas on how to run my wires from the center console to the rear area....my steel wire fish never seems to find its way.