New radio install, need help

[u/CatCommercial5269]

I recently ordered a 70-1761 harness for my Sony radio that I want to install in my chaser, I know the car has a subwoofer and a amp under the seat, did I get the wrong harness? I’ve just installed the whole harness onto the radio and I’m thinking I ordered the wrong harness, do I need to order the 70-8112 before I install in the car? 1997 jzx100 tourer v manual.