ecu pinout and plugs

[fugazzye]

i fix my car, i bought from japan, year 2003 but comes without ECU, ill get one new, but,,,,,when i tried to install it, sorprise the ECU comes 12 pinout in 1 of the 2 plugs on the harness that come from the engine, in fact both plugs are for 10 pinouts.

can anybody tell me whats happening here??

thnksss for the info