anyone who has the air fuel ratio gauge, is the hookup to the sender unit complicated? how does it connect in the engine compartment?

I have a trand temp guage that I have in my A pillar pod, I was thinking of swapping it out for the air fuel ratio guage instead, and since I have the sender wire going into the engine compartment and then down to the tranny line input, I could just rerun the sender wire to the new air fuel sender if it is simply a one wire hookup??