Power Billboards via USB/not batteries?


I just purchased a billboard and "USB Power Cable for the Brickstuff LEGO® Lighting System" but the billboard power supply/animation driver and USB cable don't interface (which is fine bc I can use the USB cable in other applications).  
Anyway... the billboard description states:

"The power supply can operate on either four AAA batteries (not included), or a connecting cable is also included that works with the standard Brickstuff power supplies."

Specifically, what is the power supply or connector/adaptor I can link to the driver instead of having it run on batteries?  I prefer a "permanent" usb/wired connection, which seems possible.  If so, a link to the exact product would be great!

Beautiful work on the billboard, btw!

Many thanks!


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