Vegas 460 piston rings order HELP

#1
I'm assembling a Vegas carts 460, I'm not sure which compression ring goes on top and which direction. One ring has an "0" stamped on it and both sides seem to be the same shape with sharp corners. The other ring says NH or HN on it with slightly angled corners on both sides. Which goes on top? Thanks!!
 
#2
In an automotive application the markings go up. Don't know if it would apply to your application as well.

Typically if a ring is direction specific it is because it has a beveled out edge that has the sharp edge UP for compression and cylinder seal.
 
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