Z tape only is good when there is a mechanical force applied. Potentially some foam tape on the metal case could be sufficient but probably also really bad.
Soldering is not difficult, just takes practice but even a first timer could do this. Maybe not everyone but almost. The barrier for most people to learning is not having the tools.
Do yourself a favor and buy a soldering iron and some solder and try to put some wires together. It’s a useful skill that lasts a lifetime.