As Andrew says, you don't have a choice about the rings because they're right and left threaded and can only go on their respective sides of your BB shell. The cartridge can go either way according to the desired chain line, but the original version had the grooved side go into the grooved cup.
When this BB first came out years ago, they used to pre-assemble one cup onto the cartridge, and retain it via a steel spring clip trapped in the grooves. Some time later they decided this wasn't necessary and now sell it with both cups loose.
BTW- be sure to apply grease between the cups and cartridge. Otherwise water wicks into the gap causing corrosion which binds the cups to the cartridge. It's not terrible if one cup gets stuck to the cartridge, but if both bind, you'll need extraordinary methods to remove the BB.
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