I have an 88 firebird that I converted to carbureted. Pulled out the ecm and wiring harness. Now I’m not a wiring guy so this is where I need some assistance.

this is the switch panel that I bought.
I need to wire an in-line fuel pump, torque converter lock up and radiator fan as well as the ignition on the button. I want the main switch on the left to power and kill everything.
how do I go about this?
I have a fuse panel that I mounted under the hood so all of these switches have fuses. Do I draw power straight from the battery to the main switch and then to the fuse panel and then everything from there?
please help!!!

 

Why not just use the original system? Why "fix" something that isn't broken?...

 

So this car died a few years ago that’s one reason I pulled out the fuel injection and converted it. I checked all of the possible reasons why it could have died including the weird chip keys and bypassed the anti theft and ignition. And nothing. So I had a guy help wire it and he had robbed power from one of the wires that was part of the ecm harness and that’s gone now. So I’m starting from scratch