Planning on modding a Mayflash arcade stick


I was planning on modding my Mayflash arcade stick, but I was wondering what materials do I need to start modding (such as wires/etc). Also, I didn’t really understand how to connect the wires to the buttons. Can I just solder it directly to the button or do I need to attach the wire to something? I was also wondering if the wires could be easily replacesable if they get damaged. One of the wires for the stick is kinda squashed, so I was wondering if it would pose any problems.