How to assemble AN lines and fittings video
 

Helpful video on how to construct stainless steel lines with AN fitting

That's okay but there's some finer points he didn't mention. Once it's at depth you should mark the bottom of the fitting before putting it in and the internal peace. And you should push on the hose down into the fitting will you make up the end piece of the fitting. Once it's done you should verify that the hose is not backed out of the hose out of the external part of the hose end.