Port=LeftStarboard=RightOr am I misunderstanding the question? If you are talking about the underseat (belly) tank and the kicker tanks in the bilge area, I believe “Left” on the selector is the belly tank and “Right” is the back kicker tanks.Last edited by toledobasser on August 10th, 2016, 11:06 pm, edited 1 time in total.Jim EbarbMany, LA (Toledo Bend Lake)2004 Cougar/ 225 OptimaxHumminbird Helix 12 Chirp SI on BalzOut Mount at bowLowrance HDS 7 at bowHumminbird Helix 12 Mega SI on Ram Mount at ConsoleLowrance HDS 8 in dash at console