I wouldn't dare recommend those jumper cables to anyone. I might use them myself someday. Because I know what I am doing, and can only blame myself if somethings goes wrong.
But, the switch assembly is two switches and four wires (three switches and six wires counting the cpu switch). With quite some damage imaginable, if the jumpers are not installed correctly. Notice, this is outside of the transformer secondary fuses.
And one other thing. The connectors are actually quite hard to detatch. And I will only permamently close the interlock(s) on tournament day. I want them active for general maintainance etc. The CPU switch, naturally, but also the power switch.