Not the exact answer you’re looking for, but if the only thing stopping you from soldering a premade button to your case is a lack of soldering iron (and I’m assuming the knowledge of how to use one), depending on where you live they are incredibly cheap and accessible, and for the kind of soldering you’d be doing here you can learn how to do it very quickly, probably a 15 minute YouTube video and some practice on spare wires.

If you’re into this kind of tinkering, you’re probably gonna need to use one anyways, it’s one of those things where you probably won’t use it all that often but it’s invaluable when you need it. I had to rebuild my printer a few weeks ago which included an upgrade to a stealthburner extruder and I do not trust that simply twisting and taping all of those wires together would’ve been sufficient.