Hey folks - I’m running some AF through the engine this weekend prior to some colder temps. The manual mentions winterizing the ballast system as well by pouring AF into the vent holes. But, I can’t tell which hole is which? 
Can anyone please clue me in as to which hole needs AF poured into it to reach the tank/bags? (boat is equipped with supplemental ballast as well)
Many thanks!
Aaron

Can anyone please clue me in as to which hole needs AF poured into it to reach the tank/bags? (boat is equipped with supplemental ballast as well)
Many thanks!
Aaron