Prior to world exit, the coloured wireless connector behaves as expected and as specified in the guide, refusing to attach to cables that do not have the same colour.
However, when exiting and re-entering the world, they lose their colour exclusivity, and start connecting to differently-coloured cables.
While this doesn't cause this specific setup to break, more practical setups break for me, such as when including a wireless connector in the center of a cube like this; as the differently-coloured cable will connect to both wireless connectors.
Minecraft version: 1.20.1
AE2 version: 1.3.1
ExtendedAE version: 1.0.2