[aeroace]

Spin the spindle nut down to about 10 lb/ft of preload, you can move it either way a bit to get the castle lined up with the hole in the spindle. Not so tight it prevents the wheel from turning easy(without the caliper on there) but not loose either.

Safety wire can be attached to anything that will hold it. I like 2 bolt pairs. Make sure it "pulls" in the right direction to tighten the fastener not loosen it.