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On all above deck fuel tanks there is a fitting for the quick disconnect hose connection. Each manufacturer has a standard. Some take up alot of room (like your photo).

You can change the hose/tank connection to any style to save room and help ergonomics. My preference is the brass Tohastu/Nissan style since they are brass and streamlined.

Any decent chandlery will have the male fitting that goes into the tank and the female connector that goes on the hose.

For example:

Tank - https://shop.hamiltonmarine.com/produ...19052.html

Hose - https://shop.hamiltonmarine.com/produ...23049.html

If you choose to keep the tanks under the seat, you can thread the fuel line in the tunnel. This is how many of the 16'7 and 17' models are rigged. No worries.