If they're car racing pedals, they will be set up with one axis allocated to each pedal. For rudders, you want both pedals working a single axis. CH pedals have a switch to switch the circuitry from one mode to the other (plane or car).
I'm not sure if you pedals can do this? If they can, no worries, if not, you may need to rewire them along the lines of how the CH pedals work. The non-pro pedals are a good simple example of this.