[Elecraft] K3 Bandstop Filter Schematic

[PHIL WESTOVER]

I'm not yet an owner of a K3, but I have been studying the schematic package 
to learn as much as I can about the rig.

On the RF Board schematic, sheet 1 of 4, upper left border of the page is an 
apparent multi-pin connector is labeled as "Z3 Stop-Band Filter."  The next 
sheet after all of the RF Board schematic sheets is a schematic called 
"Bandstop Filter."  I'm assuming this is the circuit that interfaces with 
the Z3 connector.  But I can't figure out how the Bandstop filter would 
connect electrically to Z3!

Could someone educate me?  Of course, that may be a lost cause!  :-)

Thanks in advance!!

73,
Phil Westover, WA7URV (K1, K2, KX1, and a K3 not too far away!)