Wiring a G7 transformer

I'm wiring a Cinemag transformer, but I first want to understand the signal flow of the Lundahl and I'm confused.  In the wiring diagram on Lundahl's site, it shows that pin "6" should carry positive signal and out pins "1" and "4", and "5" would carry negative.  However, on the G7 PCB, the positive signal goes into "5" instead of "6".  Positive signal is still taken from pins "1" and "4", but since I'm wiring a Cinemag, I want to make sure I understand what's happening.  Is this because the transformer is wired backwards?  Can someone please explain this?

yes, the amplifier inverts phase, so we invert again in trafo.

Jakob E.