Honestly, its only going not be important for transmission in on itself, Machines can always accept both directions, and small Motors/Turbines can have the direction of rotation toggled via some tool (probably monkey wrench was it) too already.
But yeah they are going to be “straight” Wire alike Axles that just 1:1 transmit power with a tiny loss because of the Axle Weight being rotated, or maybe only voiding the initial packet so as to get the Axle started and after that no longer consuming additional power for transfer like an Electric Wire would.