It really doesn't matter, You turn them to give yourself a little leeway in mounting and positioning your scope. If you have a shorter scope then you can turn them to the inside or if you have a longer scope then you may want to turn them outside or both forward to move the scope away from your eye. What ever suits you. They also make a #402 which is extended even further and can come in handy if you have an extremely short scope or want it further forward or back than the #46's allow. Hope this helps.
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