Take black hoses closest to the seats on the thru hull and plumb into the bottom of sacs using brass/barbed fittings. Then get 4ft(8ft total) of clear 3/4" or 1" hose and connect to top of sac w/ brass/barbed fitting and out the original thru hull. This will fill and empty with stock switches. The sacs are done when 2 streams of water are coming out the back. This will work for the rears but I have seen a few people have a quick connect for a front sac.
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