I put mine under the console and ran cables around edge of deck to it. The transducer plug is so large I was afraid to try pulling it under the deck even though I have a rope already there for runs. After a few trips I think the cables around the edge will be fine.

If I have problems with the cables I had thought I might try to pull electrical wire tubing through under the deck and if I could get it then try the cables through it. That plug is large and if you damage it you are screwed.