I see nothing wrong with the mount
the noise could be caused by something else, such as suspension and driveline, since you say it only occurs going uphill... perhaps you should consult your mazda dealer about this? They might know about this via a service bulletin
one other common issue is the belt tensioner going bad... it will cause a rattle sound when accelerating... you will also see that it leaks oil/grease out and looks very dirty... if your noise is coming from the right side, that's where the belts and tensioner is... go take a look and see