[Chas]

   

Schematics often have some form of diagrammatic to the symbols not only as a draftsman's short-cut but to inform the reader of certain characteristics of a component. This loop is no exception. The drawing indicated there is no direct connection to the AVC. It does indicate with end is which by virtue of connections to the inside or start of the winding and outside or finish. These connections should be observed as the secondary is tapped and reversing connections of the tap would hinder performance.  If the windings have been peeled back and possibly shortened that too will effect reception... It is most important that the secondary not be shortened.

If you are still unclear, I have two examples of this radio in my collection that I can access and take images...  chas