garmin chest strap with fulgaz

Hi, I have asked this question before (https://forums.garmin.com/sports-fitness/cycling/f/edge-830/367598/garmin-chest-strap-on-fulgaz) but didn't follow it up properly. So in order to progress this, Luko79 talked about bridging etc and i have no idea what that means and how it would work. My chest strap works with my Garmin 830 (but I don't know whether it's Ant+ or bluetooth - how to tell). Either way, can someone explain to me how I would pair it with fulgaz, please. Oh, just to say, the trainer I use is an Elite Zumo.