I had 25 EL panels, each about 2.75" X 1.25", and made a 5-sided "night light" with 5 EL panels on each "pane" or side.
I don't have photos of the manufacture of the individual 5-panel panes. However, the basic idea is visible in the photo. Each of the 5 EL panels was attached to a piece of acrylic with a dab of hot glue, with the two leads passing through small holes to the back side. One lead from each EL panel was bent to the left and the other to the right. Then I laid 6" stripped copper wires across the left and right sets of leads, and soldered the leads to the wires. More hot glue secured the wires to keep them from wiggling around and possibly breaking the delicate leads.