valve cover holes 2 - 3 ???

[sactoC10]

OK,

This may be a simple question to some of you, but being the perfectionist that I am, it is a concern for me. I am cleaning up my engine compartment and will probably get to the point of installing my Mr. Gasket chrome valve covers in the next month or so.

Over the weekend I realized the there are three holes in the stock valve covers 2 on one, 1 on the other and most of the aftermarket chrome ones only have one hole on each.

Is the normal thought here simply to keep the breathers in place and then add oil in one of the breather holes instead of having a separate oil fill hole?

Just need to know. Thanks!