An addition to what Al said, you might want to buy a couple of circular housings for your connectors.
It will make it more organized and if put a male/female to the analog PWM ports and a female/mail to the speed controllers etc., it will make life easier if you have to replace a specific speed controller down the line, a spike, or even the brain. It will make your life much simpler.
Also I suggest having a few "back-to-back" speed controllers ready so that you just have to pop out two-three screws and pop them back in with the new speed controllers and it wills save you the hassle of removing a speed controller and adding one on. I suggest having at least 1 of those arrangements [two speed controllers] for both spikes and victors because you never know when you'll need it.
~Pavan.