Ah, so USB cable is permanently attached, and both cables are sandwiched by the lid in cut outs, now it makes sense. Thank you

Maybe I'm assuming a box larger than just bigger than the board. What are the dimensions of the box you recommend, or a source and part number.

So does the board just float inside the box on the cables? The female usb socket is flush to the edge of the board, how do you stabilize or secure it to the box to allow cable install and removal?

What is the best way to mount the board in a project box and which cable restraints are most rugged?