Garmin 945 - heart rate strap

I am finding the wrist base heart rate a bit erratic when mountain biking ( per initial reviews of the watch). I can pair my Wahoo tickr hr strap to the watch but does anyone know how I can display the data. I can’t find a data field for it. There is a respiration rate but that is more for the swimming hr strap. Any ideas?

Once paired it shows Heart Rate from the strap over the wrist.

Thanks - that would make sense