[Healeys] Healey Heater System

[W.D. Nelson]

I am installing my dash and instrument panel.  Take a look at Moss catalog, p
96.  The vent tubes connect to the air box with a rubber elbow.   The same
rubber elbow is attached to the other end of the vent tube.  To what does that
elbow attach.  On my 190 SL a similar connection obviously went into a plastic
distribution envelope that was, in turn connected to the vent piece in the
dash.  I see no such distribution piece to which the Healey vent tube
attaches.  Not in any manual or in any catalog that I can find.  How does the
vent tube connect to the vent pieces in the dash top?
Thanks for the help.  bill n