This image--- might help to explain air hole placement--there is a small airhole on side of 510 connection and on the Nautilus the air comes in from the side.
In the part called -----"Coil Basis"----- below the hole is at bottom of 510 connection and this is where auto batteries get the air to work.
The Nutilus bypasses the 510 connection and air comes directly to coil from the side.
auto batteries need this hole as in this image---------->