To order a reader for one (or multiple) in-store locations, hover your mouse over the Finances tab to the left of your screen, expand the drop-down menu, and click "Devices"

Here you'll see any active readers you currently have. If you haven't ordered a reader, you'll click "Purchase Devices" in the middle of your screen.

You can then select which location you want a reader shipped to, how many readers, and finally preview before ordering!