2000 Celica GT + Avantguard5

Ok well, 1 problem a friend and I are having is finding where the 4 pin connector connects to. Its the 4 pin connector that has a wire for the starter side starter, key side starter, coil side ignition, and key side ignition. Or something like that. So we got those wires hooked up to the right wires, but at the end there is a white 4 pin connector in which the install manual says "To System Module" but there isnt an input for it on the brain.

Another thing, is when we powered everything up (We didnt install the thick wiring harness that Im assuming is for the remote start), we get response from the alarm, but it doesnt lock or unlock the car. We wired the AG5 using the TypeB lock type diagram. The car is a 2000 Celica GT, and for the lock/unlock wires, we used the switch in the center console.

Any help would be greatly appreciated. Thanks in advance.