Open post for normal draw of the atty. Worst case scenario, you get 1 drop of
juice on your connector.
Sealed post works, but the atty will produce a lot less vapour and the draw will be stiffer.
Hopefully, it's an empire drip shield you ordered, as the chinese copies are utter crap and you bearly get any airflow.
Btw, i'm not a fan of airy draws and most of the times i consider drip shields just a looks improvement or a 901-must-have-accessory.
For certain you'll find many uses for a 510-510 , so you can order one sealed one unsealed anyway.