Question concerning fit of front brake rotors

I am dry fitting a router to the stub axle just to try to understand what holds the caliber on. I will wait until the suspension is installed to really do this because of the extra weight of the brake stuff. I am not putting any of the bearings in which may be the problem.

When I install the keyed washer and nut there is a lot of play in the router.

When I really do install the router with the bearings, do I pack as much grease in them ?

I am still trying to figure out what holds the caliper on the unit.

I have torqued ever nut on the suspension so getting closer to the install.

Any help is accepted.

Ian.