You have got a 2jzgte wiring loom Ok......
But your engine wiring is from an Aristo 2jzgte motor.
Aristo 2jzgte's engine wiring/plugs come like the one that you have
pictured!
The ecu plugs are one twin gray plug (80 pins) like the one you've got
on the above picture and comes from the engine wiring loom,and another
one (40 pins) which is also gray colored! This one uses signals for the
cars/dashboard/sensors like speed sensor etc.,which you don't have
on your posted pictures.The guy that sold you the motor should have
given you the plug (40 pin,gray colored) along with about 8-12 inches
of wiring (Aristo incar cut wiring),for you to make a hybrid connection
of the needed signals and wires! And remember that this plug doesn't
come from the engine wiring!
The much bigger plug (with 28 and 27 pins),also gray colored which
comes from the engine wiring loom (Aristo Plug only...also known as Aristo trade mark) goes to a junction block / fuse block into the Aristo vehicle.
If the motor had come from a Supra vehicle,would have had 3 smaller
plugs (3 or 4 plugs maybe one yellow,one orange,and one gray colored)
This plug conteins signals for the dashboard like water temperature,oil
level,oil pressure dash warnings,Diagnosis check box,and has 2 IGN power
wires that mast be feeded with + 12 V ignition power for the ISC valve
and another part that I don't remember....
Anyway...You have to get yourself the 2nd single ECU plug that came
from the Aristo body (from the interior)...so you can make your wiring!