Fiat 126p Engine Swap: 1.2 8V MPI from Punto, Wiring & Immo Control Unit Connections

Hello, I am swapping my baby for a 1.2 MPI engine from Punto. I have all the electrics written and connected, but the problem is with the immo control unit, there are 5 wires to it:
Red - constant plus with battery
White with blue stripe - immo indicator on the meter
Two wires go to the ankle fastened to the engine harness: black and gray-green
I have one blue wire with a red stripe left, it connects to several wires of the same color, one goes somewhere to the fuse box, another to the reverse sensor in the box, and the other somewhere deep into the car. Personally, I would consider it + after the ignition switch, but I wonder where the control unit "takes" the mass from, maybe from the engine harness and it is the black wire?
I am asking for a hint, I do not want to release this switch, it is so close to start the car; P
best regards

Here you have a list of switchboard cubes, I don't remember how the colors went.

Give me a picture of the engine compartment and how you slept with the box.

Steel flange and spear, sweep that hey ........ driveshafts and joints are dead, or cc or skoda
http://www.terytorium126p.pl/topic/27193-maluch-swap-12-mpi-5-speed/

Thank you for the description of the ankle, the engine fired, soon a test drive Electricity and a few other things still need to be improved.

best regards