Hey Nations!
Welcome to the forum.
Here's my two cents.
In addition to what you already have, you probably will also need the control panel cables to connect the joystick,
the 1/2 player and jump buttons to the DK pcb.
I know the pain of being stuck in a dead end when it comes to arcade restorations as sometimes that kind of info is hard to come by.
I'm sure there are much knowledgeable members on this forum that can give you solid pointers.
Senior members, let's help nations out!