Best way to duplicate certain modeled faces to another location on the mesh

So i have created this hole for this speaker i am modelling

I want to copy this exact same hole… to the empty face that is above it…

How can I do this?

You could delete the face you want the duplicated geometry to go to (in your case the top one), duplicate the geometry and put it in the same place and then merge the overlapping vertices together (Alt-M)

Ah yeah of course…pretty simple then…thank you!

If you have vertex snap on, you can pretty much take away any error as well. I use this technique all the time.