When running the wiring for outputs, run any power and ground wiring back to the points where they will be connected, but do not connect power or ground connections yet.
Run the injector wires within the loom to the fuel injectors (each injector shares a common +12V with the wires labelled "injector output" from the ECU providing the ground to switch the injector on and allow the fuel to flow).
Connect your fuel pump back to the fuel pump relay.
Run the loom from all ignition outputs to ignition modules (often called ignitors or spark amplifiers), but leave the ignition modules disconnected at this stage. See warning at beginning of manual.
Connect ignition modules to coils and run wiring for coil(s) power supply back to the relay.
Connect idle control motors if applicable.
Connect any other auxiliary devices such as thermo-fans or turbo wastegate solenoids.