nitrous switch installation

[mnludedvr]

i have an s200 and was attempting to rewire my current setup to let hondata run my nitrous system. All i want to do right now is get it so the system is armed and i'm having problems with that. I'm a little confused with the wiring diagram that hondata gives, but here is how i have it wired:

toggle switch:
power--->12V
ground-->chassis
load----->B5 (i just used an inline splice)

is that right? and when it says that the factory switch has to be rewired, but what does it mean when it says rewired?