Flange spacer which way round

[Webbaldo]

I'm changing the drive flange oil seals on my 3 rib box at the min

The spacer under the flange fell off before I could see which way it went

One side is curved and one is flat, which side faces outwards?

This one

 

[Webbaldo]

Found answer on type2.com, its flat side outwards if anyone needs to know