Place the supports of the glass into the wooden tray and fix them with wood glue. (2)
If you done this, you need to glue the patterns on each other. So you get a piece of 10 mm thick. It is necesarilly that you put the patterns perfect in place. Use some clips to do that.
Take than the two long flat patterns. You need to install them onto the baseplate (on both extends ) with wood glue. (3)
(4) is the end result of the first subassembly.