[Elecraft] Sun=b Rx and Aux RF question

[Dave G.]

Antenna connections;

Pages 38 & 39 of the current manual show a dashed line between the Aux RF 
connector and the line to SA4/Relay K1 for connection to the sub receiver.

1) Why is it shown as 'dashed'?
2) Does this connection exist?? 
3) Does this mean that AuxRF gets connected permanently to relay K3 in the 
KAT3??

Enquiring minds would like to know   ;-))

--
Dave G.   KK7SS
'65 MK III Sprite in Richland, WA
"Two things are infinite, the universe and human stupidity.
But I'm not so sure about the universe."  ... Albert Einstein.