As 9D280 said, it should run up the front of the leg, rubber hose, normally a bit thicker than 1/4", may have a plastic plug if not connected, or may be a continuous run up to the console with the wiring harness (if connected.)
These things are notorious for plugging up with bits of sand, shell, seaweed, or dried salt. I(f you don't see a plugged hose on the front of the leg, take a small stiff piece of wire and clear the hole on the LU's leading edge (may have to run a thumbnail along the front to find it - they hide pretty good.)
jky
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