This is one of the best features of these wheels; you do the adjusting with the wheel mounted to the bike, giving a perfect setting with the QRs clamped down.
As the good Rev. says, it's an easy adjustment (although you don't use a 5mm wrench) and as Cycliste says, it rarely needs doing once it's done.
Most better bike shops have lots of these tools (they're made of plastic); one comes with each wheelset and the shops rarely pass them onto the customer. If you ask nice they might give one to you as well as show you how to use it.
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Today, I believe my jurisdiction ends here...