installing nitrous tomorrow and need help...

Ok, i'll be installing a wet nx system tomorrow. This is what i've figured out so far. i also have a purge kit.. but i have an idea of what to do with it.
View attachment 505709
is my diagram right?
the most important thing i want to know is..
Should i install a WOT switch? i don't really want to have the extra boost on 1st and 2nd. i just want to spray in 3rd and 4th gear.

Can i just install a push bottom so i can activate the nx at will? how would i go about installing that? where and how would that switch be installed?
thanks. a lot.
Jersey
 
I thought all NO2 systems came with an arming switch, and yes, most definitely install the WOT switch, you don't want to run nitrous except when you're at full tilt boogie, unless there's something about the wet systems of which i'm not aware...