Are you talking about switch joysticks or original ones to whichever console you're portabilizing? For switch joysticks, you can use the breakout boards at 4LayerTech (
https://4layertech.com/products/joystick-breakout-board-pack-of-2) to make it easier to wire them up. The main thing is having a way to interpret those signals for the various consoles, which is where things like GC+2 comes in.