Player 2 port now wired up. Tested and working however I don't currently have a 2nd controller for multiplayer gaming although this is coming soon! All that is left to do is to setup a way to exit games as all controller buttons are mapped. Currently thinking of wiring an extra button on the game itself to achieve this or adding a button combo in the config.

Here are some pictures from the almost finished project so far:

Player 2 port wired up (black):

Case closed with player 1 controller connected:

Game cartridge rear:

All connected:

Just a few bits left to polish off the build. Controllers ports need gluing in and the Pi needs fixing down. Almost there