The USB adapter PCB is a direct 1:1 passthrough adapter, meaning the 4 pins on the included USB go to the pin directly across from it on the screw terminals. As long as you match color to color, you are fine. See the attached photo for clarification. The only caveat is the RED WIRE on the included USB cable, its connected to both pins labeled “B” on the screw terminals.
For the shield and the ground on the stock Madcatz USB cable you can connect both together (that’s what the adapter pcb was supposed to do had my include cable not be reversed) to the same screw terminal that corresponds to the black wire on the adapter cable.