I've run mine from the cabin under the gunwale to the transom. I have an extended cabin so for the long stretch behind the galley I've used a thin diameter wooden dowel that has both strength and flex, with the cable taped to an end.
I don't know for sure about a SE,
But my 2320sc has a 4in pvc tube from the transom to the inside of the pilot house on the stbd side, below the deck that has all the wiring to the dash in it.
I used an electricians snake to pull a few wires through.