Hang the mirror vertically over the 32 inch high sideboard. Leave about 6 inches from bottom of mirror of mirror to top of sideboard.

Center the electrical boxes 56 TO 60 inches UP from the FLOOR, and NINE inches IN, from either and both ends of the sideboard and it's position on the wall. Done.

If in doubt? Use brown paper and some tape on the wall and try it out. Or just believe it : )

Thank you so much. Wish I could take a pic but furniture in storage and room down to bare walls. due to construction. Have ordered the sconces but they have not yet arrived. I really appreciate the feedback and will try to find an old pic of sideboard. Will do cardboard mock ups.

Thanks for coming back on that. In the meanwhile, it kind of sort of seems to me that Jan knows what she's talking about.

We have no idea what your furnishings look like but I would also recommend mounting the mirror vertically. Center the scones in the space between the mirror edge and the edge of the sideboard. at about eye level.

really appreciate your feedback . The vertical mirror thing is blowing my mind a bit. Have another mirror coming this week that is 31"by 41" but I'm assuming the same principles apply.

the sconces in pic are similar to mine ( mine are single light and side board similar. ) I'm considering a round mirror for more excitement and am wondering how big that should be. Have been looking at 30" to 36" mirrors. This is so helpful.

That which I TOLD you will result exactly as Beverly F illustratiion posted above : ) And yes, we both know what we are talking about. lol. More than "kinda sorta", double lol