How do the fittings, AN or hose barb, get mounted in the evaporator cores?  Welded, brazed?  Where is the optimum location for the fittings?  I have seen several positions for the fittings.  I am mounting two of the cores similar to those used in the RVs next to each other and would like to locate the inlets and outlets. Thanks for any help.

Joe Berki
Limo EZ