Have tank turret match rotation with Camera?

I think I’m getting closer but I could be way off. I’m just trying to print a bone rotation (yaw) in a HUD (userWidget). but all I get is zeros. Can I do it this way at all or am I barking up the wrong tree entirely?

I’m really just trying to figure out how to get my turret yaw value in a HUD or ABPrint. I can get the camera rotation but still cant figure out how to find out where my turret is pointing.