potentiometer

GC+ and dual tact mod - bitbuilt store Mini PAM8803 audio amp board - here I want to be able to somehow use a poteniometer on the amp board (Any guides on this?), this is what I want to use - GBA 5-pin potentiometer WiiU gamepad speakers - here 4-pin headphone jacks - here. Should I use 3-pin...

So I have two unrelated questions. 1. I'd like to add 4 3.5mm jacks to a cube. I have 5v amp. Wiring I assume is easy enough, just 4 pots and jacks in parallel but I'm a bit hung up on what jacks and pots to use. I'm pretty confident I can just use standard 3 pin headphone jacks just fine, but...