well there is the official way and the way i have done it for a while
official way see pic
my way
angle the tab to form a ramp. if paddle goes in from front to rear twist the tab down towards the front of the machine with the whole tab angled at approx 45 degrees. As you slide the paddle in the tab act like a barb and pops up behind the horzontal bar in the paddle. Make sure all 6 lugs are located before you push the paddle to lock it or you want be able to get it out again
assume the model you have aill be similar
hope it helps
Dave