dukeluv280zx

i just bought this 76 260zx with a 280zx 83 2.8 liter turbo p90 head i know thers missing parts but just dont know what bare with me will post pics dont even know where to start theres a bunch of wires cut the ecu is connected lights work guages work the ignition wont crank the car gotta do it from starter the car wont crank am thinking theres no electricity reaching the spark plugs were do i begin thanks