Print case and lid in your favorite color. Push cables trough opening, solder to trigger board. Push trigger board inside and glue the lid to the case.
If needed, change apush button with longer pin, by soldering.

Used parts: 
https://s.click.aliexpress.com/e/_DeDpFah (trigger board)

https://s.click.aliexpress.com/e/_DDfAyoh (push button)