micra pickup 1995 1.0 to 1.3 engine

Hi. I've got a 1.0 auto in my pickup.want to swap up to a 1.3 auto. its 1995 non nats loom has extra relay box on left of bay for horn, inhibitor and alike. 1.3s dont have this extre relay box only 2 by battery .Wondering what by putting a 1.3 in is it going to fire up on my 1.0 ecu as 1.3 ecu have totally different plugs and alike. Cheers.
 
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