Card reader PCB wires by color, why flopped?

[jftman]

I am looking at two HO67 calculators doing a gummy and clutch check.

I can see at each PCB that the BLUE and ORANGE wires are flopped. When I look closely at the order going into the read/write head they are also not the same from end to end.
I can imagine that inside the head they would be prolly the same connections and they just exit in a slightly different config.

But, the PCB HAS THE ORANGE AND BLUE REVERSED.
Is this a non issue? What makes this OK? Or would it be correct to switch one of them?

[teenix]

This is the sketch from Tony Duell's HP-67 circuit.

cheers

Tony

[jftman]

Thankyou Tony.
I will unflop them.