rear bearing part?

i need help putting back together my rear bearing.when i took the bearings out the spacer bar came out and also another pc that i assume is also a spacer fell out it is a flanged pc that i believe the spacer bar between the bearing rides in or on or does it go between the bearing on the race side?i cant tell by the pics in my book and there is no part # for it.any ideas? i have a p20 police bike