I've been working on a custom costume using an LED strip, WLED, and I wanted to be able to change the colors on my costume with the press of a button. This is a little box that holds my buttons with a hole on the side for wires.

The buttons

I printed the box, screwed in the buttons, soldered on ground and data wires, and then pushed the bottom lid on. It's semi-permanent. It fit well, but is likely to break the thin filament when you pull it apart.