Eastar Folding Sheet Music Stand EMS-1 Portable Metal Stand Kit With Light Carrying Bag Black

How do slide stand on

The description says it will hold 20 pounds, does that seem accurate? I’d like to use it to hold a projector.

Can the two wire clips at the bottom of the tray be moved totally out of the way so a book can rest flat on the 2" platform tray?

I lost my cord and want replace it -need its specifications -what size is the round male end? (The usb part is on the other end)