Can't swear about Sram, but here's what to look for.
Most upper pulleys have some float, and some are asymmetrical (or were), so right/left orientation mattered. If the pulley looks symmetrical, than right/left won't matter.
I have no idea why the lower pulley would have an arrow except if it's a clutch pulley intended to reduce chain bounce. If so, you need to follow the arrow. You might test the upper in your fingers to see if it spins easier one way than the other just to make sure it doesn't.
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