VCCA Home Forums TECHNICAL - GENERAL Mechanical - Engine, Trans, etc 54 HydraMatic Universal joint Ball Seat

On the 54 Hydra-Matic there is a 4 3/8" rubber seal that goes in the tranny tail housing,then there is a 6 bolt hole seat.
The seat has a tab or is continuous steel between two bolt holes on one end of the seat. Is this tabbed end installed on the top of the tranny tail housing or on the bottom of the tranny tail housing.The ball collar does not have this tabbed end and is stamped out with space in between each of the 6 bolt holes. What would be the reason for the seat to be stamped different than the ball collar and if installed improperly would that make the rubber seal leak.
Below is a link to passenger car powerglide that has same config.
http://chevy.oldcarmanualproject.com/1929_54chevyparts/04/237a.htm

Thanks
jorb

More info on u-joint ball seat Below:
link to picture of tail housing for 54 HydraMatic.The bottom of the housing is toward the hand in the picture.
http://chevy.oldcarmanualproject.com/shop/1954truck/54ctsm0781.html
link to picture of ball seat.Picture shows back side of seat that faces inward to rear of tail housing.
http://rides.webshots.com/photo/1327522155047579877STVyDM

Does the tabbed end of the ball seat go on the bottom of the rear tail housing or on the top.

Thanks
jorb