You really dont need to solder to build your control panel. The cherry switches on the buttons have male .187 connections. Just buy female .187 disconnects that crimp onto your wire and then just slide onto the male switch leads. It is snug, no fear of slipping off during gameplay. The other end of the wire, if you go with an I-Pac (Ultimarc) connects using a screw down terminal. Then the I-Pac connects to the PC via a standard cable (like your keyboard cable connection). There is no soldering in the whole setup. In fact, using the disconnects is much better than soldering, making it easier to replace a cherry switch down the road.
Have fun
Rebirth