JDM ISO is it different to yours?

Hi All! Nice to meet you! my name is Luca hope you can help as i've been puzzled all day lol. I bought a JDM Celica on Tuesday, got home and took dash apart, binned old stereo, and went to put normal UK Celica ISO adapter kit and its completely different, I was thinking of snipping the wires and putting a direct ISO to it but I don't know which wire is which as it isn't your standard speaker wires like green purple etc, I will attach a few pics for you to see. Do any of you have this ISO for your stereo? If so which adapter do I need or if you have a wire diagram that would Help, Thank you in advance

How do I attach pictures?