dont rig it to run the desi way - trace and map every cut up wire of the wiring loom - connect to the car accordingly, you can leave out the AC wiring, but do the fuel pump, ignition power, starter circuit correctly the first time. It will save you headaches of taking out the wiring later on.
The fastest way I did a swap was to do the entire loom on my workbench, Once done I put the wiring in before installing engine (testing circuit continuity with multimeter or line tester), Install the engine, every mechanical linkage, exhaust, cooling system etc, plug wiring connectors to engine sensors, controllers, prime fuel, start engine - have tea.. - Shortest amount of time is spent this way and everything works in perfect harmony.