Very easy to do, below is the image of all the components. Have you done front wheel bearings on a pre AU Falcon, because it is very much the same process. I have the workshop manual, just trying to find it so I can get you the instructions rather than writing them step by step.
And yes the vehicle is Kia not Mazda based. You should see Kia on the ID tag on the firewall.
WB Festive Rear Wheel Bearing.JPG