Wire Connector 12 Point Screw Terminal Block 5A 2
you can use Focus Attack as a good resource for all kinds of arcade stick wiring stuff. if you have wire, you can just buy the .110 quick disconnects and sleeves. or you can buy their pre-made wires.
the terminal block is in the photo you posted, so I included the names of the ones I have used successfully from amazon. you can just cut them as appropriate.
from my basic understanding of electronics, I believe you could just solder the wires to the sanwas poles, just make sure you have a common ground among all of them and connect that daisy chain to the appropriate original ground wire in the pcb. but the quick disconnects are so cheap, why not make it easier on your future self?
I hope other more experienced users give you guidance on the main thread!