Wanted to upload the template I made when I bult my fire work controller.

More pictures of the one that I made can be found here: http://www.instructables.com/id/Firework-Controller-Build/

panel can be cut from most sheet metals/ plastics or into the side of the box even.

Drill/ Laser/ Plasma the holes in your panel and mount them to the schematic done by systemf92 http://www.instructables.com/id/Fireworks-Controller/

Keep in mind that I used Binding Posts so the wire can be connected by unscrew. Unlike Speaker Terminals that systemf92 used that have to be pushed. Adjust template as need to fit your design or use of other switches or whatever.