axle install

Ok I got some photos here that Is what I think how these go together. Is there to be a gasket on the back side of the backing plate where it sits flush with the axle flange? Also do I want to put some axle grease around the bearings? Are you suppose to grease the splines where they go into the carrier? Or do I got this wrong? Seems to me either the gasket should go on the back of the backing plate or there should be 2 per axle?

Dana 60 if that makes a diference.