Portus and Haywood stereo decoder schematic sanity check-Help please.

[djsb]

I have 2 schematics for a stereo decoder. The first one is produced by the original designers in 1970. The second one is an improved version from 1978. There is one point on the second schematic that says "Link to B or C" on the newer 2nd schematic that I don't understand. Ambiguity drives me mad where schematics are concerned as when I make a schematic I try VERY hard to avoid confusion. I am on the process of making a schematic in MicroCap 12 and KiCad and I have an actual physical circuit that is working (a built kit from the late 70's) so ultimately I can check that. Just want to ask what people reckon this part of the circuit (marked with the text in quotes) is ACTUALLY connected to.
Physically checking it on the PCB is going to take a lot of disconnecting of wires. Drawing the circuit with pencil and paper would be quicker. Thanks.

[Renate]

On the second schematic:
Directly under "Link to B or C" is a line that has nothing to do with this, it bypasses it all despite having an ink blob/slash.
The white dot under that is what they mean.
That is the DC bias for the L & R outputs.
Using (A, B, C) 12 V, 6V, 0V, connect it to C, ground.
Using (A, B, C) +6 V 0 V, -6 V. connect it to B, ground.

[djsb]

Thanks Renate.

David.