8 3/4 axle end play question ??

Ok I got the axles back today with new bearings, I removed the 1/8" spacer from the pass side axle,and installed a new pass side adjuster. I will in stall them tonight...and report back.
Before I begin, can anyone tell me what side the steel flange gasket is supposed to be on with the raised rib ? the raised rib facing the axle flange side? or the raised rib facing the backing plate side? I need to know this before assembly. :)
Thanks.
Hotrod20