Just got hold of Double dragon pcb board and i am a total noob. I have a egret II candy cab running a neo geo mvs 1 slot board. I wanted to plug in my double dragon pcb board and a bit confused as the harness that was connected to the MVS 1 board has a white bracket which does not allow me to fit it into the double dragon pcb board.

I have three other harnesses but I have no idea which one is the right one and which way it should plug in. Can anybody help me please?

photo of the spare harness