In my 97 2800 SCR, there is only a chase between the radar arch and the deck on the starboard side. That is the side that everythign runs through. You could cut through on the Port side, but that would be a b!@#$.
The arch lights, anchor light and speaker wires already run down through the starboard side. It will drop right behind the panel above the headboard/locker in the midcabin. Behind there all the wiring and shifter cables from the helm run back to the engine compartment. Getting from that side forward of the head is going to be tough.
I would probably run it down the starboard side, then back into the engine compartment, across the top o fthe bulkhead between the engine compartment and midcabin, then up the port side. This will go through the port side hanging locker at the bottom of the cabin stairs and then behind the galley, thorugh the forward hanging locker and you should be up to the v berth.
However, it depends on the year of your 2800 as well.