You don't say which Sanus Euro stands you are using. There are a couple of different stands in the line. "Assuming" you are using the Euro stands for satellite speakers and not the Euro for bookshelves, the bracket on the stand doesn't match up with the curved back of the Mirage V2's. So you should return the stands and buy something that has more of a bottom plate to support the speaker and use something like blue-tac to attach the speakers to the stands.
That speaker is so tiny, I wouldn't for a second start drilling into that enclosure. Especially on the bottom where the crossover is most likely mounted. Is there anything in the instructions from the manufacturer on the speakers on mounting suggestions? Failing that, I would email Mirage and ask to be sure.
I was correct then. You purchased the satellite stands which is the WRONG type of stand to use with that particular speaker. You need something with a bottom plate to "sit" the speaker on (securing it with Blue-Tac) not something with any type of bracket.
Which even though more money, the route I would take if it were me. Barring that, I'd look around Racks and Stands dot com, racks and mounts dot com or any number of on line e-tailers and find something with a flat bottom plate that is of the appropriate size for your speakers. I would then attach them as I described above. You may have a tough time finding something of the correct size (the plate may be too big or too small), which is why I would go with the ones the manufacturer designed for that particular speaker.
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